What Is Pollution?
Pollution is anything that has a harmful effect on on the enviroment. There are five main causes of pollution: transportation (such as planes, trains, cars, trucks, and buses), power plants, oil refineries, industrial facilities, and factories. Pollution can also be caused by farms, cities, houses, and wood burning fireplaces. Another big cause of pollution is littering. When someone litters, the litter can get into storm drains, and eventually, into the ocean, where it can cause great harm to sea life.