Question

distinguish between water pollution and land pollution

Answer 1

Contamination of the natural water resources like streams, lakes, rivers, oceans, groundwater mainly by human activities is the foremost cause for water pollution. Water is one of the essential things for sustaining life on earth. Pollution of water can create adverse effects on the quality, ecological functions and thus a major threat to public health, biodiversity and agriculture.
 the same way land pollution is the contagion of land or soil through the activities of man or other variation to the innate soil environment.

Answer 2

Major difference are
water pollution is a pollution which pollutes the water 
land pollution is a pollutes land 
it harms many lives like aquatic animals living being who drink polluted water
it do not harm aquatic animals but it harms lives