In 2015 and 2017, there was very heavy rain in our state. In 2016, there was no adequate rain. These extreme conditions …

Statement 1 : BOD represents the amount of dissolved oxygen that would be consumed if all the organic matter in one litr…

What do you understand by the term polluted air ? </h2></div>

Increasing amount of <span class="katex"><span class="katex-html" aria-hidden="true&qu…

Which of the following contributes the most towards deforestation?</h2></div>

Noxious fume pollutes air due to burning of:<span><br> </span></h2></div>

What can be made using bio-degradable waste?

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