.................. has destructive effects on the entire ecosystem.</h2></div>

Which one of the following options correctly designate the percent contribution of gases (A, B, C and D) responsible of …

Ozone in stratosphere extends</h2></div>

Ozone in the stratosphere is depleted by</h2></div>

<span>"Determination of Biological oxygen Demand (BOD) can help in suggesting the quality of a water body&quo…

If the smog density of an area increases, it indicates</h2></div>

Use of pesticides decreases water pollution.</h2></div>

BOD refers to</h2></div>