definition of environmental pollution?

Question

types of environmental pollution

Answer 1

There physical causes, like eruptions of volcanoes, degradation of certain ecological systems could also create environmental pollution. Also, many others, including radiation from the Earth (radon), the Sun, ultraviolet rays, etc.
Further, People contribute by burning, radiation (bombs, reactors, powerplants, etc.)
From chemicals as wastes or leftovers.
Etc.

Answer 2

it is unwanted change in physical, chemical & biological component of the earth

Answer 3

involuntary bowel emissions