Chapter 8

 chapter 8 CHAPTER NO.8 POLLUTANTS AND DISEASES   Pollutants are the substances or agents that cause undesirable changes in the environment,...

Chapter 4

 Chapter 4 CHAPTER NO.4 ECONOMIC AND SOCIAL DEVELOPMENT   Development literally means the gradual growth of the society so that it becomes s...

Chapter 2

 Chapter 2 CHAPTER NO.2 POPULATION AND ENVIRONMENT   As an evolutionary unit, population may be defined as a group of similarly adapted, int...