What do you mean by environmental change ?
Define water pollution?
What is the meaning and objective of environmental education ?
Explain with examples the natural changes of environment?
Describe the principal constituents of earth?
How many principal gases are there in the atmosphere ?
Discuss the sources of odour pollution?
What are the sources of water pollution ?
What are the uses of water ?
What are the causes of environmental change ?
What is the meaning of odour pollution ?
Describe the principal characteristics of environment?
What are the different hypotheses regarding the origin of the earth ?
What are the measures to control odour pollution ?
Give a brief account of the components of environment.