If there was no <span class="katex"><span class="katex-html" aria-hidden="true"&g…

<span>When air is contaminated by ______________ substances which have a ________________ effect on both the _____…

Water pollution of a river is measured by __________.<span><br> </span></h2></div>

When huge amount of CO<span class="katex"><span class="katex-html" aria-hidden="true&q…

Write one negative effect, on the environment, of affluent life style of few persons of a society.</h2></div&gt…

On what does the harmful effect of pollution depend on?

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

Temperature is generally increasing making the earth a hot plate. Mention any two measures to control global warming.&lt…