NCERT Solutions For Class 12 Biology Chapter 16 - Environmental Issues


NCERT Solutions for Class 12 Biology Chapter 16 - Environmental Issues: At the present time, pollution is a great issue of concern, as it's increasing day-by-day. Human population size has grown enormously over the last hundred years. This means an increase in demand for food, water, home, electricity, roads, automobiles, and numerous other commodities. These demands are exerting tremendous pressure on our natural resources, and are also contributing to pollution of air, water, and soil. The need of the hour is to check the degradation and depletion of our precious natural resources and pollution without halting the process of development. In NCERT of Class 12 Biology Chapter 16 - Environmental Issues, you will study about all the environmental issues and pollutions and their effects.

What is pollution? Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil. Agents that bring about such an undesirable change are called pollutants. In order to control environmental pollution, the Government of India has passed the Environment (Protection) Act, 1986 to protect and improve the quality of our environment (air, water, and soil).

Here are the important topics of Class 12 Biology Chapter 16 - Environmental Issues mentioned below:

16.1 Air Pollution and Its Control

   16.1.1 Controlling Vehicular Air Pollution: A Case Study of Delhi

16.2 Water Pollution and Its Control

   16.2.1 Domestic Sewage and Industrial Effluents

   16.2.2 A Case Study of Integrated Waste Water Treatment

16.3 Solid Wastes

   16.3.1 Case Study of Remedy for Plastic Waste

16.4 Agro-chemicals and their Effects

   16.4.1 Case Study of Organic Farming

16.5 Radioactive Wastes

16.6 Greenhouse Effect and Global Warming

16.7 Ozone Depletion in the Stratosphere

16.8 Degradation by Improper Resource Utilisation andMaintenance

16.9 Deforestation

   16.9.1 Case Study of People’s Participation in Conservation of Forests

Major issues relating to environmental pollution and depletion of valuable natural resources vary in dimension from local, regional to global levels. Air pollution primarily results from burning of fossil fuel, e.g., coal and petroleum, in industries and in automobiles. They are harmful to humans, animals, and plants, and therefore must be removed to keep our air clean.

In Chapter 16 - Environmental Issues of NCERT Two major environmental issues of global nature are increasing the greenhouse effect, which is warming Earth, and depletion of ozone in the stratosphere. The enhanced greenhouse effect is mainly due to increased emission of carbon dioxide, methane, nitrous oxide, and CFCs., and also due to deforestation.

After going through the Class 12 Biology Chapter 16 - Environmental Issues line by line, you must be able to answer the questions given below:

  • Q1. Why does ozone hole form over Antarctica? How will enhanced ultraviolet radiation affect us?

  • Q2. Discuss the role of women and communities in the protection and conservation of forests.

  • Q3. What measures, as an individual, would you take to reduce environmental pollution?

If still confused or having any problem in answering these questions, then NCERT Solutions for Class 12 Biology Chapter 16 - Environmental Issues is there for you.

Also, try to attempt all the given questions in NCERT, and in case, if you have any doubt then refer to Solutions for NCERT Class 12 Biology Chapter 16 - Environmental Issues. There you will get all the answers to this chapter and it will help you to score good marks not only in the 12th board exam as well as also in other competitive exams like NEET.

NCERT Solutions For Class 12 Biology Chapter 16 - Environmental Issues: Solved Exercise Questions

NCERT Solutions class 12 – Biology

Chapter 1

Reproduction in organisms

Chapter 2

Sexual Reproduction in Flowering Plants

Chapter 3

Human Reproduction

Chapter 4

Reproductive Health

Chapter 5

Principles of Inheritance and Variation

Chapter 6

Molecular basis of inheritance

Chapter 7


Chapter 8

Human health and disease

Chapter 9

Strategies for enhancement in food production

Chapter 10

Microbes in Human Welfare

Chapter 11

Biotechnology: Principles and Processes

Chapter 12

Biotechnology and its applications

Chapter 13

Organisms and Populations

Chapter 14


Chapter 15

Biodiversity and Conservation

NCERT Solutions for Class 12- Subject wise

NCERT solutions for Class 12 Biology

NCERT solutions for Class 12 Maths

NCERT solutions for Class 12 Chemistry

NCERT solutions for Class 12 Physics


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