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
Darwin IV most of the creatures who now inhabit Darwin IV are descendants of land-dwelling animals The dense atmosphere is full of clouds and meteorologic activity and the plains sometimes resemble "weather oceans". Most of the water is found in the atmosphere, but there are also millions of tons of frozen water in the regions of the poles, and big lakes and rivers where the 'pocket-forests' reside. In the deepest part of the evaporated ocean basins, there is a "lake", the Amoebic Sea, composed of tons of microscopic creatures who have evolved to conserve the last of the remaining sea water inside