What happens when water is deoxygenated due to algal growth?

Supersonic jets cause pollution by thinning of</h2></div>

The cutting down of trees and setting them on fire and raising crops on the resulting ash is called:<span><br&g…

Briefly explain the following terms:<br> Biomedical waste.</h2></div>

The effects of radioactive pollutants depends upon</h2></div>

<span>The first pesticide to be used commercially was</span></h2></div>

What does happen to lighter components of solid waste in sea?<span><br> </span></h2></div>

What are the advantages of reforestation?</h2></div>