Drinking mineral water with a very low level of pesticides (about $0.02 \ ppm$) for long periods may:

Find the incorrect statement with respect to a catalytic converter.

$CO$ (Carbon Monoxide) is harmful because........

What is the intensity of sound in normal conversation?

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?

What are the effects of high concentrations of $DDT$ on birds?