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