Main cause of extinction of species from tropical areas is</h2></div>

One of the causes of water pollution, is excessive use of ___________ and ___________ by the farmers:</h2></div…

Phosphate pollution is brought about by</h2></div>

Ozone-layer is getting depleted because of</h2></div>

Which of the following are the dissolved materials present in domestic sewage?

Bio-agents such as culture of blue green algae are used in preparation of</h2></div>

Deforestation destroys________of animals and hence affects wildlife.</h2></div>

What is radioactive pollution?</h2></div>