Question

what do you mean by environment pollution

Answer 1

Environment pollution is the contamination of the environment which is our surrounding by harmful and unwanted particles.There are even different types of environment pollution like 
→ Water pollution.
→ Soil pollution.
→ Air pollution.
→ Sound pollution, etc.
They are very harmful for both our environment and for us.

HOPE IT HELPED YOU...................
:)

Answer 2

As he said, environmental pollution is the contamination (dirtiness) of the environment. For example: polluted river, open garbage, air, water and noise pollution etc.