Chapter No. 4 POLLUTANTS AND THEIR EFFECTS ON ENVIRONMENT

POLLUTANTS : The environment we live in is not as clean as it should be. Various natural and human activities contaminate it with harmful substances. Dust storms, rotting of vegetation, volcanic eruption, etc., are the natural phenomena which release dust Read More …

Chapter No. 3 BIOTECHNOLOGY

Biotechnology: Application of knowledge in the areas like engineering and medicines, etc., is called technology. The technology in which living things are used in different ways to help and benefit human beings is called biotechnology. Microorganisms are used in making Read More …