How many principal gases are there in the atmosphere ?
What are the sources of water pollution ?
What are the measures to control odour pollution ?
What is the meaning of odour pollution ?
What is environment ?
Define environmental studies?
What do you mean by noise pollution ?
What do you mean by environmental change ?
Discuss the sources of odour pollution?
Explain the necessity of environmental studies?
Explain with examples the natural changes of environment?
The mystery beneath the crust – explain?
What are the ways to conserve forest ?
Give a brief account of the components of environment.
What are the uses of water ?