One of the most dangerous radioactive pollutant to<i> Homo sapiens</i> is</h2></d…

Why depletion of ozone layer a cause of concern?</h2></div>

How is the value of COD compared to BOD?

Which of the following is major source of water pollution?</h2></div>

Which naturally occurring phenomenon is responsible for heating of Earth’s surface and atmosphere?

<span>Deforestation refers to</span><br> </h2></div>

Groundwater will not be depleted due to</h2></div>

List any four effects of global warming.</h2></div>