1
SERIOUS PROBLEMS AFFECTING ANIMALS AND PLANTS OF A PARTICULAR PLACE.
2
WHEN THERE ARE TOO MANY PEOPLE LIVING IN A PARTICULAR PLACE.
3
THE PROCESS OF MAKING WATER DANGEROUSLY DIRTY.
4
THE CUTTING OR BURNING DOWN OF ALL THA TREES IN AN AREA.
5
RAIN THAT CONTAINS HARMFUL ACID, WHICH CAN DAMAGE THE ENVIRONMENT.
