All of the following contribute to pollution $EXCEPT$:

$DDT$ residues are rapidly passed through the food chain causing biomagnification because $DDT$ is:

$A$ disease caused by eating fish contaminated by industrial waste containing mercury compounds is known as

In agriculture,improper drainage of water leads to:
$I-$ The soil becomes waterlogged.
$II -$ The soil surface draws up salts from the water.
$III -$ Salts are deposited as a thin crust on the land surface.
$IV -$ Salts start accumulating around the roots of the plants.
$V -$ The increasing concentration of salts becomes favorable for crop growth.
$VI -$ It is highly beneficial for agriculture.
Which of the above statements are correct?

Which of the following is a biodegradable pollutant?

Thermal pollution is more prevalent near