Chlorofluorocarbons deplete _______ layer.</h2></div>

What is Air pollution? What are the main sources of air pollution? Write a few lines about each of them<span>.<…

In which of the following process the farmers cut down the trees of the forest and burn the plant remains?

Differentiate between.<span><br> Autotrophic and heterotrophic succession</span></h2>&l…

Of the following, which is a greenhouse gas?</h2></div>

The maximum hole of ozone is found over ______</h2></div>

Decomposition of organic wastes in water causes </h2></div>

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