Define water pollution?
What are the different hypotheses regarding the origin of the earth ?
Discuss the sources of odour pollution?
How many principal gases are there in the atmosphere ?
The mystery beneath the crust – explain?
What do you mean by noise pollution ?
Describe the principal constituents of earth?
What is the meaning and objective of environmental education ?
What is the meaning of odour pollution ?
What are the causes of environmental change ?
Explain the necessity of environmental studies?
What are the ways to conserve forest ?
Define ecosystem?
Define environmental studies?
Describe the principal characteristics of environment?