Why ozone hole forms over Antarctica? How will enhanced ultraviolet radiation affect us?</h2></div>

Which of the following element is most hazardous to humans?

What makes black forest damaged by pollutants?<span><br> </span></h2></div>

What is global warming? Mention any four measures to control global warming.</h2></div>

The pesticides used in organic farming are<br> </h2></div>

The term greenhouse effect was given by<span><br> </span></h2></div>

What is the reason for the increase in the BOD?

If a water body have high amount of DDT it's 'Biochemical Oxygen Demand' (B.O.D.) will</h2></div>