An example of a point source of water pollution is

atmospheric deposition of ash and dust into water

chemical industry leakage

leakage of acids from mining

a factory turning its discharge pipe into a nearby river

DO stands for

Demanding oxygen

Digested oxygen

Dried oxygen

Dissolved oxygen

Excessive use of fertilizers can cause which of the following

eutrophication

none of the answers is correct

heavy metal contamination

biodegradable waste pollution