Great Lakes Areas of Concern rivers, and oceans causing pollution and buildup of sediment. Nonpoint source pollution is said to be the most problematic and hardest to reverse of the types of pollution because it is so hard to regulate and pinpoint where it originates. Many experts agree that nonpoint source pollution is the biggest concern facing the Great Lakes. With the increase of urbanization, a toll has been taken on the lakes in these areas. Lakes that once had stable ecosystems with the appropriate amount of plant life are now full of massive amounts of plants and algae that have been fed by excess
The Rise and Fall of the Great Lakes The Rise and Fall of the Great Lakes The Rise and Fall of the Great Lakes is a 1968 Canadian short film featuring a humorous geography lesson, in which a canoeist travels abruptly through time as he crosses the Great Lakes, experiencing cataclysmic changes in different eras. The film is narrated in ballad form. Some animation is employed in the film to show the coming and going of the Ice Age when the lakes were born, but most of the other episodes of lake history are suggested by camera tricks that affect the canoeist and so emphasize the change. There