<div><span>Increased </span><span><span class="katex"><span class=&q…

BOD (biological oxygen demand) is</h2></div>

In an agriculture field there is a prevalence of the following organism and crop disease which are affection the crop yi…

Which one of the following is the correct percentage of (the two out of four) greenhouse gases that&am…

Which one of the following is a greenhouse gas?</h2></div>

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

A lake with an inflow of domestic sewage rich in organic waste may result in</h2></div>

Example for a physical pollutant<span><br> </span></h2></div>