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