People
Air pollution causes acid to accumulate in rivers and lakes.
There are numerous causes of water pollution. Runoff from farms and factories will cause bodies of water to become unclean. Similarly, large amounts of litter, or people dumping trash into the water, can make ponds or lakes uninhabitable for animals and plants.
What will not reduce water pollution is constantly dumping garbage in to lakes and rivers.
what are some other water pollution causes
Gravity, of course. The fact that the upper great lakes are higher than the lower great lakes might explain it. Water falls over Niagra because it is higher where it comes from than where it goes to. Water flows down hill.
the Great Lakes are fresh water.( the largest fresh water lakes in the world.)
factory,oil,fuel
thermal pollution
As suggested by the name, the Great Lakes are all lakes - bodies of fresh water. Seas are bodies of salt water.
seas oceans rivers lakes fishes
There are 25% of freshwater in the Great Lakes
The contamination of water is known as water pollution. Water pollution can occur in lakes, rivers, oceans, groundwater. It is caused by litter and toxins being dumped into the water.