Реферат: Pollution In Ocean Environmets Essay Research Paper

Pollution In Ocean Environmets Essay, Research Paper

Pollution in Ocean Environments

The ocean is a fragile ecosystem that must have a element of constancy

to ensure that life can continue. The plants and the animals alike depend on

the ocean and it is being destroyed by toxins from human activities.

Pesticides like DDT are lethal to the animals in the ocean if given in large

enough amounts and in some areas there is enough DDT to do just that.

Sewage left untreated or improperly treated has the same effect as DDT. The

chemicals that come out of the sewage system in the right amount will kill the

plants and animals in the area. Industry is a vital part of the way we live, we

need electricity and all of the other goods industry provides. But industry

cause major environmental problems to the ocean. There are safe practices to

using pesticides that would reduce if not eliminate the problem. Also the

proper treatment of the sewage and industrial wastes would reduce the

amount of toxins released into the ocean.

Pesticides are a major problem to the environment, but they are also

very important to keep crop yields high. The pesticides reach the ocean

primarily through the tributaries of large rivers that eventually empty into the

ocean. The pesticides get into the rivers by runoff or wind deposition.

Pesticides have regulations that must be followed when spraying your crops

to ensure less runoff, but there was no such regulations in the past. Farmers

could spray their field with as much pesticide as they felt it required, so

obviously they sprayed on a lot. They did not relize that spraying more

pesticide than was necessary is less effective as spraying a proper amount.

This caused the ground water to become polluted with the pesticides and the

pesticides would ultimately end up in the river. When a heavy rainfall occurs

there is a lot of sediment erosion and water runoff. In this sediment and

water runoff pesticides are carried and get into the river systems. The chart

below shows the volume of pesticides used in the United States in different

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