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