What do you mean by waste water ?
What are the causes of environmental change ?
How many principal gases are there in the atmosphere ?
What is the meaning of odour pollution ?
Describe the principal constituents of earth?
Define environmental studies?
Give a brief account of the components of environment.
What do you mean by environmental change ?
The mystery beneath the crust – explain?
What do you mean by noise pollution ?
Describe the principal characteristics of environment?
What are the ways to conserve forest ?
What is the meaning and objective of environmental education ?
What are the sources of water pollution ?
Explain the necessity of environmental studies?