Lead in the atmosphere can cause</h2></div>

BOD is ___________ in polluted water and ________in potable water.</h2></div>

Which of the following organism is likely to have more concentration of D.D.T in its body?</h2></div&g…

Major source of emissions in a motor vehicle: crackcase, carburettors, fuel tank and<span><br> </span>…

Ozone is constantly being formed and broken down in the ____</h2></div>

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

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

For drinking purpose, water should be tested for _______________.<br> </h2></div>