Air and water pollution have been reduced by A using fossil

Air and water pollution have been reduced by

A. using fossil fuels in factories.

B. raising more cattle for food.

C. using only unleaded gasoline.

D. increasing biological magnification.

Solution

Ans: D: Increasing biological magnification.

Some of the pollutants accumalates in tissues and increase the concentration along the food chain is called as biological magnification. Such pollutants were non bio degradable. Once these pollutants absorbed by some organism,then they can metabolised, break down and excreted out.

Option C: also can reduce,but only air pollution.