GSEB Class 10 Science Solutions Chapter 16 Management of Natural Resources

Question 1. What changes can you make in your habits to become more environment-friendly?
Answer: To be more environment-friendly, you can make the following changes to your daily habits:

1. Avoid throwing any garbage on the roadside.
2. Turn off lights, fans, and TV when they are not being used.
3. Use less water for bathing and other cleaning tasks.
4. Opt for jute bags instead of polyethylene bags.
5. Walk or cycle for short distances instead of using vehicles, which helps reduce pollution.

In simple words: To help the environment, don't litter, save electricity and water, use reusable bags, and walk or cycle for short trips.

Exam Tip: When suggesting changes, always include actionable steps that are easy to implement in daily life, such as specific actions related to waste, energy, and water use.

Question 2. What would be the disadvantages of exploiting resources with short-term aims?
Answer: Exploiting resources with only short-term goals means using them improperly and harming the Earth to meet immediate needs and make money. This approach leads to rapid depletion of valuable resources, causing significant environmental damage. It also prevents future generations from being able to use these same resources, creating long-term scarcity and ecological imbalances that will be difficult to fix.

In simple words: Using resources for quick benefits damages Earth and leaves nothing for the future, causing big problems later.

Exam Tip: When discussing disadvantages of short-term exploitation, focus on resource depletion, environmental damage, and intergenerational inequity.

Question 3. How would these advantages differ from the advantages of using a long-term perspective in managing our resources?
Answer: From a long-term perspective, we manage resources so that we are answerable for any improper use. We use resources carefully and make sure that future generations also get to benefit from them. This approach effectively controls and minimizes pollution, ensuring a healthier environment for everyone. It focuses on sustainability, allowing resources to regenerate and be available for many years to come.

In simple words: Long-term management means using resources carefully so future generations can also benefit, while also reducing pollution.

Exam Tip: When comparing short-term and long-term perspectives, highlight sustainability, intergenerational equity, and pollution control as key benefits of a long-term approach.

Question 4. Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
Answer: An equitable distribution of resources will help these resources reach every person in a more affordable and simpler way. This ensures that everyone has fair access to what they need, promoting equality and reducing disparities. However, individuals or groups who aim to get money only from these resources would work against this fair distribution. They might hoard resources, create artificial scarcities, or manipulate markets to benefit themselves, thereby preventing wider access for everyone else.

In simple words: Resources should be shared fairly so everyone can get them easily. People who only care about making money from resources will stop this from happening.

Exam Tip: When addressing equitable distribution, explain its benefits (access for all) and identify the opposing forces (profit-driven motives or resource monopolization).

Question 5. Why should we conserve forests and wildlife?
Answer: Conservation of forests is important because forests are useful to us in many ways:

• They give raw material for the timber industry.
• They help prevent soil erosion and floods.
• They provide medicines, herbs, gum, and resin.
• They offer a living place for many animals.
• They maintain the water cycle by bringing rainfall.

Wildlife conservation is also important because:

• It helps maintain the ecological balance in nature.
• It also helps forests by making plant growth easier in different places through seed dispersal.
• By grazing grass, it also helps maintain the soil's richness.
• It also assists in cleaning forests.

In simple words: We must protect forests because they give us resources, prevent disasters, and support animal life. Wildlife protection is also vital as it keeps nature balanced and helps forests grow.

Exam Tip: When explaining conservation, list distinct benefits for both forests (economic, ecological, environmental) and wildlife (ecological balance, seed dispersal, soil health).

Question 6. Suggest some approaches towards the conservation of forests.
Answer: For the conservation of forests, here are some helpful approaches:

1. It should be confirmed that the illegal cutting of trees is banned and made a punishable act.
2. Stakeholders should take charge of maintaining the forest.
3. Forest fires should be monitored and put out.
4. People from nearby villages or communities should be taught and educated on how to manage forests effectively.

In simple words: To save forests, ban illegal logging, involve local people in maintenance, control fires, and educate communities.

Exam Tip: Focus on a multi-faceted approach to conservation, including legal measures, community involvement, active management, and education.

Question 7. Find out about the traditional systems of water harvesting/management in your region.
Answer: The traditional systems of water harvesting management include:

1. Bandharas and tals in Maharashtra
2. Bundhis in Madhya Pradesh and Uttar Pradesh
3. Kulhs in Himachal Pradesh
4. Khadins, tanks, and nadis in Rajasthan.
5. Ahars and pynes in Bihar.

In simple words: Different regions use old methods to collect water, like Bandharas in Maharashtra, Bundhis in MP/UP, Kulhs in Himachal, Khadins/tanks/nadis in Rajasthan, and Ahars/pynes in Bihar.

Exam Tip: For regional questions, provide specific examples of traditional systems with their corresponding locations for full marks.

Question 8. Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions.
Answer: Water harvesting systems in hilly and mountainous areas are different from those used in plains and plateau regions. For example, in hilly areas like Himachal Pradesh, a local irrigation system called kulhs was developed. The water flowing in streams was diverted into human-made channels, which carried this water to many villages down the hillside. In contrast, water in plains is collected in check dams or tanks, tals, or bundhis, which are designed for flatter terrain to store surface water.

In simple words: Hilly regions use systems like kulhs to channel stream water, while flat plains use check dams or tanks to collect water.

Exam Tip: When comparing systems, explain the unique geographical features that influence each method (e.g., steep slopes for kulhs, flat land for tanks) and provide a clear example for each type of region.

Question 9. Find out the source of water in your region/locality. Is water from this source available to all people living in that area?
Answer: The source of water in our region is primarily the municipality supply of water and underground water (groundwater). However, there is a shortage of water during the summer season, which means most people do not have consistent access to water. This scarcity often leads to challenges for the community, especially in hotter months, affecting daily life and sanitation.

In simple words: Our water comes from the municipality and underground, but in summer, many people in our area don't have enough water.

Exam Tip: When describing water sources, include both the origin (municipality, groundwater) and any significant issues related to its availability (scarcity, unequal access).

Question 1. What changes would you suggest in your home in order to be environment-friendly?
Answer: The following changes can be made to be environment-friendly at home:

1. Check for water wastage, properly close taps, and recycle washing machine water for toilets.
2. Stop using traditional bulbs and switch to CFL lights.
3. Use solar water heaters and cookers, and install a solar cell panel for electricity.
4. Reduce garbage by sorting items that can be reused and recycled.

In simple words: To be eco-friendly at home, save water, use energy-efficient lights and solar power, and recycle waste.

Exam Tip: Provide specific, practical examples for each category (water, energy, waste) to show a thorough understanding of environment-friendly habits.

Question 2. Can you suggest some changes in your school which would make it environment friendly?
Answer: To make a school more environment-friendly, several changes can be suggested:

1. Recycle waste paper instead of throwing it in the garbage.
2. Implement a rainwater harvesting system.
3. Plant more and more trees around the school campus.
4. Make compost from collected biomass like food waste and fallen leaves.

In simple words: Schools can become eco-friendly by recycling paper, collecting rainwater, planting trees, and making compost from organic waste.

Exam Tip: When suggesting school-based changes, focus on practical actions that involve collective effort and resource management, such as recycling, water conservation, and green initiatives.

Question 3. We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife. Which among these should have the authority to decide the management of forest produce? Why do you think so?
Answer: The local people living near the forest should be given the authority to make decisions about the management of forest produce. They can supervise and regulate the misuse of the forest and its resources. These individuals are typically the ones who do not exploit the forest and understand how to manage it so that it remains available for their future generations. Their traditional knowledge and direct dependence on the forest give them a unique perspective and a strong incentive for sustainable management.

In simple words: Local people should manage forest products because they live there, know how to use resources wisely without destroying them, and want them to last for their children.

Exam Tip: When advocating for a specific stakeholder, clearly state the group and provide strong justifications based on their knowledge, dependence, and historical practices, emphasizing sustainability.

Question 4. How can you as an individual contribute or make a difference to the management of (a) forests and wildlife (b) water resources and (c) coal and petroleum?
Answer: As an individual, you can make a difference in managing natural resources:

(a) Forests and wildlife – Use less paper and avoid wasting it, as trees are cut down to make paper. Do not buy any animal products created by harming animals, such as fur, skin, tusks, or horns.

(b) Water resources – Use buckets for bathing instead of showers to save water. Recycle water from washing machines for toilet use.

(c) Coal and petroleum – Use public transport or transport that runs on CNG. Switch off lights, and minimize the use of air-conditioners and room heaters.

In simple words: To help with forests, save paper and don't buy animal products. For water, take bucket baths and reuse washing machine water. For fuel, use public transport, switch off lights, and reduce AC/heater use.

Exam Tip: For questions asking for individual contributions, provide practical and specific actions for each resource type. Emphasize reduction, reuse, and alternative choices.

Question 5. What can you as an individual do to reduce your consumption of the various natural resources?
Answer: You can reduce your consumption of various natural resources by following the 5 R's:

(a) Refuse - Decline to buy or accept products that are harmful to the environment, such as plastic bags.

(b) Reduce – Minimize your use of resources, for example, by saving electricity by turning off unnecessary lights and fans, and by walking whenever possible.

(c) Reuse – This is better than recycling. Instead of discarding used envelopes, you can turn them inside out and use them again. Plastic and glass containers and bottles can also be reused.

(d) Repurpose – When an item cannot be used for its original purpose, use it for some other helpful function, such as growing plants in broken china clay utensils.

(e) Recycle - Collect and process products like plastic, paper, glass, and metal so they can be made into new items.

In simple words: Follow the 5 R's: Refuse harmful products, Reduce what you use, Reuse items instead of throwing them away, Repurpose old things for new uses, and Recycle materials.

Exam Tip: Clearly define each 'R' and provide a distinct, simple example for each to demonstrate understanding of its application.

Question 6. List five things you have done over the last one week to: (a) Conserve our natural resources. (b) Increase the pressure on our natural resources.
Answer:

(a) To conserve our natural resources: I chose to walk to nearby places or cycle instead of driving a car. I turned off lights when not needed. I minimized water usage and checked for extra water flow.

(b) To increase the pressure on our natural resources: I used an air conditioner. I shopped for new clothes.

In simple words: I conserved resources by walking, cycling, saving electricity, and using less water. I put pressure on resources by using air conditioning and buying new clothes.

Exam Tip: Give contrasting examples for conservation and increased pressure, making sure each example is a common, relatable action.

Question 7. On the basis of the issues raised in this chapter, what changes would you incorporate in your life style in a move towards a sustainable use of our resources?
Answer: To save various resources and move towards sustainable use, I would adopt the 5R's: refuse, reduce, repurpose, reuse, and recycle. I would minimize the use of coal and petroleum, switching to CNG where possible, and use electrical equipment sparingly. I would also avoid wasting paper and water. Additionally, I would not buy goods made by killing animals, such as fur, leather, or tusks, to protect wildlife.

In simple words: To use resources wisely, I would follow the 5R's, use less fossil fuels and electricity, avoid wasting paper and water, and not buy animal products like fur.

Exam Tip: Connect your suggested lifestyle changes directly to the 5R's and broader themes of resource conservation (fossil fuels, water, wildlife) discussed in the chapter.

Question 1. What is a natural resource?
Answer: All the materials we get from nature and then use are called natural resources. These resources exist without any human intervention and are essential for our survival and daily activities.

In simple words: Things we get from nature and use, like air, water, and forests, are called natural resources.

Exam Tip: A good definition should clearly state that natural resources originate from nature and are utilized by humans.

Question 2. Name two important natural resources.
Answer: Two important natural resources are forests and water. Wildlife is also a vital natural resource that helps maintain ecological balance.

In simple words: Forests and water are two key natural resources.

Exam Tip: When asked to name examples, choose well-known and broadly significant resources.

Question 3. What are 5 R's used to save environment?
Answer: The 5 R's used to help save the environment are Refuse, Reduce, Reuse, Repurpose, and Recycle. These principles guide us in managing waste and consuming resources more sustainably.

In simple words: The 5 R's for saving the environment are Refuse, Reduce, Reuse, Repurpose, and Recycle.

Exam Tip: Listing the 5 R's correctly is crucial. Remember to use consistent capitalization or case as per the standard definitions.

Question 4. Define biodiversity.
Answer: The total number of different species found in a particular area is called biodiversity. This includes all the various types of plants, animals, fungi, and microorganisms that inhabit an ecosystem.

In simple words: Biodiversity means how many different kinds of living things, like animals and plants, live in one area.

Exam Tip: Emphasize "number of species" and "area" for a complete definition of biodiversity.

Question 5. Name the bacteria whose presence in the water indicates its contamination with disease causing microbes.
Answer: Coliform bacteria are the type whose presence in water suggests contamination with disease-causing microbes. These bacteria are commonly found in the intestines of warm-blooded animals and their presence indicates fecal pollution.

In simple words: Coliform bacteria in water show that it's dirty and might have germs that cause illness.

Exam Tip: Remember that coliform bacteria serve as an indicator, not necessarily the direct cause of disease, but a sign of potential pathogen presence.

Question 6. Why fossil fuels should be used judiciously?
Answer: Fossil fuels should be used carefully because these resources are finite, cannot be renewed, and contribute to pollution when burned. Their limited supply means they will eventually run out, and their combustion releases harmful substances into the environment, causing air pollution and climate change.

In simple words: We should use fossil fuels wisely because there's a limited amount, they don't grow back, and they cause pollution.

Exam Tip: Key reasons for judicious use include their non-renewable nature, finite supply, and environmental impact (pollution).

Question 7. State 2 advantages of constructing dam across a river.
Answer: Two advantages of building a dam across a river are that it helps in generating electricity and aids in irrigation. Dams allow for the controlled release of water to power turbines, producing hydroelectricity, and they store water that can be channeled to agricultural fields for watering crops.

In simple words: Dams are good because they make electricity and help water farms.

Exam Tip: State two distinct advantages clearly. Common benefits include electricity generation, irrigation, and flood control.

Question 8. Name the place where “Chipko Andolan” organised.
Answer: The "Chipko Andolan" was organized in Reni Village in Garhwal. This was a non-violent social and ecological movement by rural villagers, particularly women, to protect trees and forests.

In simple words: The "Chipko Movement" started in Reni Village, Garhwal.

Exam Tip: Ensure you name both the village and the region for complete accuracy.

Question 9. Who started the “Chipko Movement”?
Answer: Sunderlal Bahuguna started the "Chipko Movement." He was a famous Gandhian activist who championed the protection of forests and the environment through non-violent protests.

In simple words: Sunderlal Bahuguna began the "Chipko Movement."

Exam Tip: Correctly identify the key figure associated with the movement.

Question 10. Name the main constituents of coal and petroleum.
Answer: The main constituents of coal and petroleum are carbon, nitrogen, hydrogen, and sulfur. These elements form the complex organic compounds that make up these fossil fuels.

In simple words: Coal and petroleum are mostly made of carbon, nitrogen, hydrogen, and sulfur.

Exam Tip: Listing these four key elements is sufficient for answering what coal and petroleum are mainly composed of.

Question 11. Name the gases responsible for global warming.
Answer: The main gases responsible for global warming are carbon dioxide and methane. These are greenhouse gases that trap heat in the Earth's atmosphere, leading to an increase in global temperatures.

In simple words: Carbon dioxide and methane are the gases that cause global warming.

Exam Tip: Clearly state the primary greenhouse gases. Mentioning both carbon dioxide and methane is important.

Question 12. State two disadvantages of constructing dam.
Answer: Two disadvantages of building a dam are that it can cause earthquakes and loss of habitat, and submerging plants release methane gas, leading to a greenhouse effect. The immense weight of stored water can induce seismic activity, and the large areas flooded for reservoirs destroy natural habitats, while decaying vegetation under water generates powerful greenhouse gases.

In simple words: Building dams can cause earthquakes and destroy animal homes, and also release harmful methane gas that warms the Earth.

Exam Tip: Focus on distinct, major negative impacts. Environmental (habitat loss, methane release) and geological (earthquakes) disadvantages are good choices.

Question 13. Name any one example of stakeholder of forests.
Answer: An example of a stakeholder in forests is the Bishnoi community in Rajasthan. This community has a long history of protecting trees and wildlife, demonstrating their deep connection and vested interest in forest conservation.

In simple words: The Bishnoi community in Rajasthan is an example of people who have a direct interest in forests.

Exam Tip: Provide a specific, well-known example to illustrate the concept of a stakeholder in forests.

Question 14. Name two dam projects which are facing criticism.
Answer: Two dam projects that have faced criticism are the Tehri dam on the river Ganga and the Sardar Sarovar dam on the river Narmada. These projects have been criticized for their environmental, social, and economic impacts, including displacement of people and ecological disruption.

In simple words: The Tehri dam on the Ganga and the Sardar Sarovar dam on the Narmada are two projects that have been criticized.

Exam Tip: Accurately name two specific dam projects and their associated rivers for a complete answer.

Question 15. What are the products formed when coal and petroleum are burnt?
Answer: When coal and petroleum are burned, the products formed include carbon dioxide, water, oxides of nitrogen, and oxides of sulfur. These combustion products have various environmental impacts, including greenhouse gas emissions and acid rain contributors.

In simple words: Burning coal and petroleum creates carbon dioxide, water, and harmful oxides of nitrogen and sulfur.

Exam Tip: List all major combustion products. It's important to include the oxides of nitrogen and sulfur in addition to carbon dioxide and water.

Question 1. Why do we need to use our resources carefully?
Answer: We need to use our resources carefully because they are limited, and the human population is growing at a very fast rate, which increases the demand for these resources. For long-term use and to protect them, we must manage our resources thoughtfully. If we don't, they will run out, affecting future generations and causing environmental issues.

In simple words: We must use resources carefully because they are limited, the population is growing, and we need them for the future.

Exam Tip: When explaining careful resource use, highlight the concepts of finite resources, increasing demand, and the importance of preservation for future use.

Question 2. How does mining cause pollution?
Answer: Mining causes pollution because it creates a large amount of slag, which is waste material discarded for every tonne of metal extracted. This slag can contain harmful chemicals that contaminate soil and water. Additionally, mining activities release dust and pollutants into the air, affecting air quality and human health.

In simple words: Mining pollutes because it leaves behind lots of waste, which contaminates soil and water, and also releases air pollution.

Exam Tip: Focus on the primary by-products of mining (slag) and the environmental pathways of pollution (soil, water, air).

Question 3. Why are forests called as biodiversity hot spots?
Answer: Forests are referred to as biodiversity hot spots because they are places where a large number of different species are found. A wide range of life forms, including bacteria, fungi, ferns, flowering plants, various animals like insects, birds, reptiles, amphibians, and mammals, all live in the forest. This high concentration of diverse species makes them crucial for global biodiversity.

In simple words: Forests are called biodiversity hot spots because they have a very high number of different kinds of plants and animals living there.

Exam Tip: The core of the answer is "large number of species" and "range of different life forms" concentrated in one area.

Question 4. For the conservation of forest, who can be a stakeholder?
Answer: For the conservation of forests, several groups can be considered stakeholders:

1. The people who live in or around the forest.
2. The forest department of the government.
3. The industrialists who use forest products.
4. The wildlife and nature enthusiasts who want to protect nature.

In simple words: People living near forests, the government's forest department, industries using forest resources, and nature lovers are all stakeholders in forest conservation.

Exam Tip: List a variety of stakeholders, ensuring you include local communities, government bodies, industries, and environmental groups to show a comprehensive understanding.

Question 5. Prejudice against the traditional use of forest areas has no basis. Comment.
Answer: Prejudice against the traditional use of forest areas often lacks a solid foundation, which can be shown with an example. The Great Himalayan National Park, for instance, has alpine meadows that were historically grazed by sheep in the summer. Nomadic shepherds would bring their flocks up from the valley each summer. When the National Park was created, this practice was banned. However, because there was no grazing, the grass initially grew very tall and then fell over, preventing fresh growth. This shows that the traditional use was actually helpful for maintaining the forest ecosystem and promoting new grass growth.

In simple words: The idea that traditional forest use is bad is often wrong. For example, stopping sheep from grazing in the Himalayan Park actually harmed the grass growth, showing that old methods can be good for forest health.

Exam Tip: When commenting on such statements, use a specific example to illustrate how traditional practices can be beneficial and how stopping them can lead to unforeseen negative consequences.

Question 6. Name two industries based on forest produce.
Answer: Two industries that depend on forest products are paper industries and industries that use bamboo, bidi, and tendu leaves. Paper is made from wood pulp, while bidi cigarettes are made by wrapping tobacco in tendu leaves, both sourcing their raw materials directly from forests.

In simple words: Paper industries and those making bidis from tendu leaves both rely on things from forests.

Exam Tip: Provide clear examples of industries that directly use forest products as their primary raw material.

Question 7. Why is it necessary to conserve forest and wildlife?
Answer: It is essential to conserve forests and wildlife to maintain balance in the ecosystem, prevent floods, and avoid droughts. Forests regulate climate and water cycles, while wildlife maintains food chains and plant health. Without them, natural systems can collapse, leading to severe environmental consequences like increased natural disasters and species loss.

In simple words: We need to save forests and wildlife to keep nature balanced and to stop floods and droughts from happening.

Exam Tip: Highlight key ecological services provided by forests and wildlife, such as ecosystem balance, flood prevention, and drought mitigation.

Question 8. What is rainwater water harvesting? What is the main purpose of water harvesting?
Answer: Rainwater harvesting is the process of collecting rainwater, allowing it to soak into the ground, discharge down through the earth, and increase the groundwater level. The main purpose of water harvesting is to manage water resources effectively. By capturing and storing rainwater, it helps to replenish underground aquifers, reduce surface runoff, and provide a supplementary source of water, especially in regions with limited fresh water access.

In simple words: Rainwater harvesting means collecting rainwater to let it soak into the ground and raise the water level. The main goal is to manage water better.

Exam Tip: Define rainwater harvesting by its mechanism (collecting, percolating) and its core objective (managing water resources and increasing groundwater).

Question 9. Name the products of combustion of coal and petroleum. How do they affect our environment?
Answer: The products of combustion of coal and petroleum are \( \text{CO}_2 \), \( \text{H}_2\text{O} \), oxides of sulfur, and oxides of nitrogen. These substances are released into the atmosphere and have significant effects on our environment:

• \( \text{CO}_2 \) contributes to the greenhouse effect and global warming.
• Oxides of sulfur and nitrogen cause acid rain.

In simple words: Burning coal and petroleum creates carbon dioxide, water, and sulfur and nitrogen oxides. Carbon dioxide causes global warming, and sulfur and nitrogen oxides cause acid rain.

Exam Tip: Clearly list all major combustion products and then describe their specific environmental impacts, linking each product to its effect.

Question 10. A tribe is living near the forest. Name two things which they will commonly use from forest.
Answer: A tribe living near the forest will commonly use timber and firewood from the forest. They also collect fruits, gum, and medicines, which are essential for their daily needs and traditional practices.

In simple words: Tribes near forests often use timber and firewood for their homes and cooking.

Exam Tip: Choose common and essential items that demonstrate direct dependence on forest resources, like timber and firewood.

Question 11. Give an example of people's participation in the management of forests.
Answer: An excellent example of people's participation in forest management is the saving of the sal forest in Arabari in Midnapore District. The Chipko Movement also protected trees from being cut down in Reni village of Garhwal. In Arabari, a forest officer named A.K. Banerjee involved local people in reviving 1,272 hectares of forest. In return, villagers were given employment in silviculture and harvesting, receiving 25% of the harvest. They were also allowed to gather firewood and fodder for a small fee. Due to this active community involvement, the Arabari sal forest saw a remarkable revival, with its value increasing significantly by 1983.

In simple words: In Arabari, villagers worked with a forest officer to regrow the sal forest, getting jobs and a share of the harvest in return, showing how people can help manage forests.

Exam Tip: Provide a specific historical example, mentioning the location, the type of forest, and the benefits for both the community and the forest to demonstrate effective participation.

Question 12. Write two advantages of classifying sources as renewable and non-renewable.
Answer: Two advantages of classifying sources as renewable and non-renewable are that it helps us decide how to use each resource carefully and wisely. Firstly, this classification helps us understand the importance of utilizing renewable sources of energy more often. Secondly, it makes us aware that non-renewable resources are limited, prompting us to conserve them for future generations. Knowing this difference allows for better planning and sustainable resource management.

In simple words: Classifying resources helps us know to use renewable energy more and save non-renewable ones because they are limited.

Exam Tip: Clearly link the classification to informed decision-making regarding utilization and conservation, emphasizing the difference in usage strategy for each type.

Question 13. Which is better recycle or reuse? Give example.
Answer: Reuse is better than recycling because recycling requires extra energy. For example, glass containers that held jam or pickles can be reused at home to store kitchen items. If these containers were sent for recycling, a lot of energy and money would be spent to process them into new bottles. Reusing simply extends the life of an item without additional processing, saving resources and reducing environmental impact immediately.

In simple words: Reusing items is better than recycling because recycling uses more energy. For example, you can reuse an old jam jar for storage instead of recycling it.

Exam Tip: Clearly state which is better, provide a concise reason (energy consumption), and offer a simple, relatable example to support your point.

Question 14. Give three changes you will make to stop or lower the use of coal and petroleum.
Answer: To stop or lower the use of coal and petroleum, I would make three key changes:

1. Switch off lights when not necessary and use CFL bulbs instead of traditional ones to save electricity.
2. Avoid using petrol-fueled vehicles and instead opt for CNG or public transport.
3. Walk or cycle for short distances instead of driving to reduce fuel consumption.

In simple words: To use less coal and petroleum, I would save electricity, use CNG vehicles or public transport, and walk or cycle for short trips.

Exam Tip: Focus on practical, actionable changes related to energy consumption and transportation to demonstrate how an individual can reduce fossil fuel dependence.

Question 15. What are the advantages of water stored in ground?
Answer: There are several advantages to storing water in the ground:

1. It does not evaporate.
2. It recharges wells.
3. There is no danger of mosquito breeding.
4. It provides better availability of potable water.

In simple words: Storing water underground prevents it from evaporating, refills wells, stops mosquitoes from breeding, and makes clean drinking water more available.

Exam Tip: List distinct benefits, covering aspects like conservation (no evaporation), supply (recharges wells), health (no mosquito breeding), and quality (potable water).

Question 16. Inspite of plenty rainfall in monsoon in some areas of India, there is failure to sustain water availability. Give reasons.
Answer: Despite abundant monsoon rainfall in certain areas of India, there is a failure to maintain water availability due to several reasons:

1. Loss of forest cover prevents rainwater from soaking into the ground.
2. Underground water sources are not replenished effectively.

These factors lead to rapid runoff, reduced infiltration, and a decline in groundwater levels, causing water scarcity even after heavy rains.

In simple words: Even with lots of rain, some areas in India don't have enough water because fewer trees mean less water soaks into the ground, and underground water isn't refilled properly.

Exam Tip: Link the failure to sustain water availability directly to ecological factors like deforestation and hydrological processes like groundwater recharge.

Question 17. What are three basic cause that has brought criticisms about large dams projects?
Answer: Three basic causes that have led to criticisms about large dam projects are:

1. Social problems – Their construction displaces many tribals and local peasants without proper compensation and rehabilitation.
2. Economic problems – Such projects require a lot of money for setup or construction but often do not offer a proportional output or benefit.
3. Environmental problems – The construction causes deforestation and leads to a loss of biological diversity.

In simple words: Large dams are criticized for three reasons: they displace people without fair help, they cost too much for the benefits they give, and they destroy forests and wildlife.

Exam Tip: Categorize the criticisms into social, economic, and environmental impacts, providing a specific reason for each category.

Question 18. The constant exploitation of the natural resources had led to several consequences for the common man and nature to face. With the help of examples list down few these consequences.
Answer: The continuous over-use of natural resources has caused several negative outcomes for both people and nature. Here are a few examples of these consequences:

• Excessive use of groundwater has led to a sharp drop in the water table, causing many places to face a severe shortage of drinking water.
• Burning fossil fuels creates air pollution. Too much carbon dioxide in the atmosphere contributes to global warming.
• Some polluting gases, like oxides of nitrogen and sulfur, cause acid rain, which harms living beings, monuments, and buildings.
• Overuse of fertilizers and insecticides leads to soil pollution and soil erosion. These chemicals also enter the food chain, impacting human health.
• Many pollutants flow directly into water bodies, resulting in water pollution in many rivers, lakes, and oceans. This harms numerous creatures on land, in the air, and in the water.

In simple words: Using too many natural resources causes problems: groundwater drops, burning fossil fuels leads to global warming and acid rain, chemicals pollute soil and water, and many animals die.

Exam Tip: When listing consequences, provide distinct examples for each type of resource (groundwater, fossil fuels, soil, water bodies) and explain their specific impacts on both humans and nature.

Question 19. The stakeholders play a very vital role in sustaining the resources. With the help of one example justify the statement.
Answer: Stakeholders indeed play a crucial role in maintaining resources. This can be justified with the example of Arabari in West Bengal. In Arabari, local people participated in forest management to ensure its future. The older methods of policing and surveillance were completely ineffective in reviving the degraded sal forests of the Arabari forest range, often causing conflicts with local communities and making people feel alienated from conservation efforts. Then, a visionary forest officer named A.K. Banerjee involved the local people in the restoration of 1,272 hectares of forest. In exchange, the villagers were given jobs in silviculture and harvesting, and received 25% of the harvest. They were also permitted to gather firewood and fodder for a small fee. Due to the active participation of the local community, the Arabari sal forest experienced a remarkable recovery. By 1983, the value of the forest had risen to Rs. 12.5 crores. This example clearly shows how involving local stakeholders can lead to successful and sustainable resource management.

In simple words: People who care about resources, called stakeholders, are key to protecting them. For example, in Arabari, local villagers helped a forest officer restore a forest, getting jobs and benefits in return. This participation made the forest healthy again and increased its value.

Exam Tip: Use a detailed and specific example like Arabari to clearly illustrate how active stakeholder involvement directly leads to positive outcomes in resource sustainability.

Question 20. Suggest few alternative ways to conserve our natural resources.
Answer: Here are a few alternative ways to conserve our natural resources:

1. Solar energy is being utilized to produce electricity in many places. Although the technologies for solar energy are still expensive, future prospects look promising for wider adoption.
2. Battery-driven automobiles represent another development that can help replace internal combustion engines in vehicles, reducing reliance on fossil fuels.
3. Hydrogen is being used as a fuel in buses and cars in several countries. When used as a fuel, hydrogen produces water as a byproduct, making it an environment-friendly fuel option.

In simple words: To save resources, we can use more solar power for electricity, switch to battery-powered cars, and use hydrogen as a clean fuel in vehicles.

Exam Tip: When suggesting alternatives, focus on renewable energy sources and sustainable transportation methods that reduce reliance on non-renewable resources.

Question 21. What is Namami Gange Programme? What are the objectives of this programme?
Answer: The Namami Gange Programme is an integrated conservation mission approved as a flagship program by the union government in June 2014. It was launched to achieve the twin goals of effective reduction of pollution, and the conservation and rejuvenation of the National River Ganga. The program is managed by the National Mission for Clean Ganga, which was established in October 2016.

In simple words: Namami Gange is a government plan started in 2014 to clean and protect the Ganga River by reducing pollution and restoring it.

Exam Tip: Clearly state the program's name, when it was launched, and its two main objectives (pollution abatement and conservation/rejuvenation).

Question 22. Give three main uses of fossil fuels.
Answer: Three main uses of fossil fuels are:

1. Fossil fuels are used for generating electricity; specifically, coal is used in large thermal power plants to produce electricity.
2. Coal and petroleum are also utilized in industries to create goods from raw materials.
3. Petroleum is used for transportation; petrol or diesel is used in vehicles.

In simple words: Fossil fuels are mainly used to make electricity, create products in factories, and power vehicles for transport.

Exam Tip: Focus on distinct and major applications of fossil fuels, covering electricity generation, industrial use, and transportation.

Question 1. What are fossil fuels? How are they formed? Why should we use them judiciously?
Answer: Fossil fuels are obtained from the remains of plants and animals that were buried under the Earth millions of years ago. These remains transformed into fuel due to immense heat and pressure. Fossil fuels should be used carefully because they are non-renewable resources, meaning they cannot be remade once used. Additionally, their combustion releases harmful and polluting gases like \( \text{CO}_2 \), which causes the greenhouse effect, and oxides of nitrogen and sulfur, which lead to acid rain. Therefore, using them judiciously helps preserve them for longer and reduces environmental damage.

In simple words: Fossil fuels come from ancient plants and animals buried deep underground for millions of years. We must use them wisely because they are limited, cannot be replaced, and create pollution that harms the environment.

Exam Tip: Ensure your answer covers all three parts of the question: definition, formation, and reasons for judicious use, linking the environmental impacts to the need for careful consumption.

Question 2. What is sustainable development? Explain it with respect to forest, wildlife and water resources.
Answer: Sustainable development means properly managing natural resources by using them wisely and carefully so that they are also available for future generations. All these resources are maintained to meet present needs without compromising the ability of future generations to meet their own needs. The global population is increasing, which means the demand for these resources is also rising, but their availability is limited. Proper management would prevent the over-use of these resources and keep them accessible for a long time.

Forest – Many industries, such as timber, wood, bidi, and tendu leaves, depend on trees in the forest. These industries often cut down trees for their use. This practice needs to be managed appropriately, ensuring that new trees are planted, animals are not harmed, and forests are preserved. This way, the forest resources can continue to support industries and ecosystems for years to come.

Wildlife – All animals in the forest face disturbance due to human interference. Animals are also hunted for the trade of their skin, fur, tusks, horns, and other parts. If the animals in the forest are not properly managed and cared for, they will become extinct, which would disrupt the ecological balance of the Earth. Protecting wildlife ensures the health and stability of ecosystems.

Water Resources – The main water resources include rivers, lakes, ponds, and underground water. These water sources are becoming polluted, and underground water is being over-extracted, causing water levels to drop. Therefore, replenishing underground water through rainwater harvesting is essential. This helps maintain water availability and ensures that communities have access to clean water for their needs.

In simple words: Sustainable development means using natural resources smartly so there's enough for future generations. For forests, it means managing cutting and planting trees while protecting animals. For wildlife, it means preventing harm and extinction to keep nature balanced. For water, it means stopping pollution and refilling underground water through methods like rainwater harvesting.

Exam Tip: Start with a clear definition of sustainable development. Then, for each resource (forest, wildlife, water), explain how its management aligns with sustainable practices, highlighting both current issues and conservation methods.

Question 3. What is rain water harvesting? How can it be done at local level? What are its benefits?
Answer: Rain water harvesting is the traditional water-saving methods to collect every bit of water that has fallen on land. To achieve this, we need to dig small pits and lakes, construct simple earthen dams, build dykes, and set up limestone reservoirs, along with rooftop water collecting units. These actions will help recharge groundwater levels and restore rivers. Water harvesting methods give people power over their local water resources, ensuring that the misuse and excessive use of these resources are decreased. Storing water underground has many benefits. It does not evaporate, spreads to refill wells, and gives moisture for plants over a wide area. It does not create breeding grounds for mosquitoes and is also protected from contamination by human and animal waste.
In simple words: Rainwater harvesting is a way to collect and store rainwater, helping to raise groundwater levels and provide water for local use. It has many benefits like preventing evaporation and keeping water clean.

Exam Tip: When explaining rainwater harvesting, always define it first, then list local methods and clearly state its environmental benefits.

Question 4. Dams are constructed on the river for multipurpose use. Give its advantages and disadvantages.
Answer:
Advantages of dams: (i) Water held in dams helps with irrigation; canals are built to deliver water to fields. For instance, the Indira Gandhi Canal transports water from the Bhakra dam in Punjab to desert villages in Rajasthan, bringing plant growth and improving the soil. (ii) Water in dams is always accessible to nearby people for use after it has been purified. (iii) Dam water is also utilized for making electricity. Water falling from a specific height gains energy and turns turbines, thus generating hydroelectricity.
Disadvantages of dams: (i) Social Problems: Building dams submerges many human settlements, making many people lose their homes. The government should offer fair payment for relocating these individuals, but this often doesn't happen. (ii) Ecological problems: Dam construction causes significant deforestation, which results in a loss of biological diversity. Many plants get covered by water, and their decay releases methane gas, a greenhouse gas, leading to global warming. (iii) Economic problems: Building dams requires huge amounts of money. The government spends a lot on construction, but the advantages or results often do not match the investment.
In simple words: Dams offer benefits like irrigation and power generation, but they also cause problems such as displacing people, harming nature, and requiring a lot of money without always providing equal returns.

Exam Tip: When discussing dams, always present both the benefits (irrigation, electricity, water supply) and the drawbacks (social displacement, environmental damage, economic costs) to give a balanced view.

Question 5. Explain 5R's with one example each.
Answer: By following the 5 R's:
(a) Refuse - Decline to buy or accept products that could harm the environment, such as plastic bags. (b) Reduce - Decrease or lessen the use of resources by conserving electricity (turning off unneeded lights and fans) and walking whenever possible. (c) Reuse - This is better than recycling. Instead of discarding old envelopes, we can turn them over and use them again. Plastic and glass bottles can also be used multiple times. (d) Repurpose - When something cannot be used for its original purpose, find another helpful use for it; for example, growing plants in broken ceramic pots. (e) Recycle - Gather and process products like plastic, paper, glass, and metal to make new items.
In simple words: The 5 R's are: Refuse (say no to harmful products), Reduce (use less resources), Reuse (use things again), Repurpose (find new uses for old items), and Recycle (turn waste into new products).

Exam Tip: Always remember the order and meaning of each 'R' (Refuse, Reduce, Reuse, Repurpose, Recycle) and provide a clear, simple example for each one.