Question

What is pollution
Thanks

Answer 1

the presence in or introduction into the environment of a substance which has harmful or poisonous effects................................

Answer 2

there are many kinds of polution the most 2 inportant pollutions are
human polution and enviormental polution 
in human poluoion humans can be poluted both mentaly and phisicaly
mentaly means turning into bad ways ,tension ,etc
phisicaly means deasease afeting the body etc
next the enviormental pollution it means the pollution of our surroundings there are many types of enviormental poollutionthey are
air       polluton
water  ,,,,,,,,,,,
and
land    ,,,,,,,,,,,,,