Official CBSE Study Materials for Class 12 Biology
Access comprehensive study materials and useful resources for Chapter 16 Environmental Issues using the CBSE Class 12 Biology Environmental Issues Concept Map. Designed to align with the 2026-27 CBSE academic guidelines, these advanced resources help Class 12 Biology students reinforce core concepts beyond standard textbooks.
Advanced Resources for Biology
Access the complete useful resource PDF for Class 12 Biology below. Regular practice with these targeted academic notes builds familiarity with complex topics and helps secure higher marks in final school evaluations.
CBSE Class 12 Biology Environmental Issues Concept Map. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.
Environmental Issues concept map for CBSE Class 12 Biology Chapter 16 covers air pollution, water pollution, soil pollution, noise pollution, their harmful effects, control measures, biomagnification and BOD, arranged as a revision map for board exams.
POLLUTION
Pollution is any undesirable change in the physical, chemical or biological characteristics of air, land, water and soil which harms human beings.
Agents that bring about pollution are called pollutants. Pollutants are of two kinds:
1) Biodegradable
2) Non Biodegradable
AIR POLLUTION
Pollutants:
Gaseous matter
Particulate matter
Control of particulate matter: Electrostatic precipitator, Scrubber
Harmful effects of air pollution:
Respiratory problems
Reduced plant growth and yield
Premature death of plants
Control measures for air pollution:
Maintenance of automobiles
Use of lead free petrol and diesel
Use of catalytic converters in automobiles
NOISE POLLUTION
Harmful effects of noise pollution:
Physiological disorders
Psychological disorders
Hearing impairment
Sleeplessness and stress
Increased heart beats
Alters breathing pattern
Control measures for noise pollution:
Sound absorbent materials
Hospital and [label incomplete in the PDF]
Permissible sound levels of crackers
Fixed timing for use of [label unclear in the PDF]
WATER POLLUTION
Algal bloom:
Algal bloom is a sudden growth of algae in water bodies, which is one of the effects of water pollution.
Bio-magnification:
Increased concentration of toxicant at successive trophic level.
Impurities in water:
Suspended solids
Colloidal materials
Dissolved materials
BOD (Biochemical Oxygen Demand) - its importance:
Causes fish mortality
Greater BOD means more pollutant
Shows the presence of organic matter
Indicates rate of uptake of O2 by microbes in the water
SOIL POLLUTION
Pollutants of soil:
Radioactive wastes
Agro chemicals
Hospital wastes
E-wastes
Solid wastes
Types of wastes:
Biodegradable
Recyclable
Non Biodegradable
Please click the link below to download pdf file of CBSE Class 12 Biology Environmental Issues Concept Map.
Free study material for Biology
Biology Class 12 Exam Resources: Chapter 16 Environmental Issues
Quick Revision Material for Chapter 16 Environmental Issues
Review targeted study resources for Chapter 16 Environmental Issues tailored for Class 12 learners. Utilizing these structured notes and quick-revision tools ensures complete alignment with current CBSE evaluation standards.
Expert Notes and Solved Exam Questions
Designed around the official curriculum, these study guides guarantee standard compliance. Reviewing step-by-step solutions clarifies complex sub-topics within Chapter 16 Environmental Issues and demystifies standard marking schemes for Biology evaluations.
Additional Study Resources for Class 12
Maximize your grade potential by utilizing Class 12 Biology practice papers in tandem with these structured notes. All printable assignments and interactive mock tests on our platform are updated for the 2026 session and available free of charge.
FAQs
Our advanced study package for Chapter 16 Environmental Issues includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 12 students learn as per syllabus for 2026 exams.
The Mind Maps provided for Chapter 16 Environmental Issues act as visual anchors which will help faster recall during high-pressure exams.
Yes, teachers use our Class 12 Biology resources for lesson planning as they are in simple language and have lot of solved examples.
Yes, You can download the complete, mobile-friendly PDF of the Biology Chapter 16 Environmental Issues advanced resources for free.
Yes, our subject matter experts have updated the Chapter 16 Environmental Issues material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.