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