Minamata disease is a pollution-related disease that results from:

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?

Particulate pollutants from smoke chimneys can be removed by which of the following?

According to the Euro-$II$ norms,which of the following is correct?

Match the columns:

Column-$I$	Column-$II$
$(1)$ Mercury	$(a)$ Low blood pressure,blindness
$(2)$ Lead	$(b)$ Hyperkeratosis,liver cirrhosis
$(3)$ Arsenic	$(c)$ Bone deformation,testicular atrophy
$(4)$ Cadmium	$(d)$ Abdominal pain,haemolysis
	$(e)$ Anaemia,convulsions

Snow blindness is caused by