What lakes and streams are around the Greenbelt/Lanham area?

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• Water pollution In the world there is not much of rivers, which have not been contaminated by human waste. Of sewage into the rivers fall fertilizer and pesticides from agricultural lands. And as they get water from the sewage and drainage ditches. Some of the plants is drained into rivers and streams of dirty water of the lake. Water pollution of rivers and lakes of nitrate fertilizers on the planet is growing almost every week. In 1984 he became the victim of one of the lakes in the United States. Unfortunately, even in the event that prohibit the use of nitrate fertilizers tomorrow, the situation will deteriorate. Nitrate slowly for many years, seep through the ground in the river beds or lakes. Dirty waste water and manure get into the lakes and reservoirs and cause the rapid growth of slime - algae that choke the river fauna and flora. For example, in 1988 off the coast of Sweden Ting killed millions of fish. Thor Heyerdahl, the famous Norwegian scientist, writer and traveler, in 1947 on the raft swam a considerable part of the Pacific. He later wrote that, along with shipmates was "deeply disturbed and striking beauty of the ocean clean." But after a later trip, committed to papyrus boat, he remained a very different impression. Walking the coast of Africa, Central America, saw a lot of traveler's all kinds of garbage: plastic bottles, and various packaging materials, etc. But especially upsetting to the fact that large areas of the ocean surface covered with a layer of some particles, some of which were the size of of a pea. The smell reminded of the smell of sewage and rotting fish. These particles are covered with a thick layer of water, so that it was unpleasant to give up. They were also traces of human activity - lumps of black oil. Thor Heyerdahl wrote with regret: "Pollution of the ocean products of human activity is not appreciably only near the coast, but over a wide area in its central part." "Modern man, - noted scholar - apparently does not understand that everything around us - are products of the earth and sea and that he must protect these sources. If the pollution of nature will continue, we will cut the branch on which we sit. " Nuclear waste The most dangerous to all life on this planet is a nuclear waste production. Nuclear waste can cause cancer, DNA changes, and death. That wastes are harmless and disappear radioactivity must pass 80 thousand years. But today, the liquid waste is pumped out sometimes just to the seas, and gases into the air. Solid wastes accumulate. Most radioactive waste buried, and sometimes kept in containers on the ground. This is very dangerous, because at any moment they may have gap will leak hazardous substances.

• Answer:

  This sentence which is in paragraph 2 can be changed from "Thor Heyerdahl, the famous Norwegian scientist, writer and traveler, in 1947 on the raft swam a considerable part of the Pacific. He later wrote that, along with shipmates was "deeply disturbed and striking beauty of the ocean clean" to In 1947, Thor Heyerdahl,the famous Norwegian scientist, writer and traveler, toured a considerable part of the Pacific on a raft. He later wrote that he along with his shipmates were deeply amazed by the striking beauty of the clean ocean.