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water pollution

저작시기 2007.01 |등록일 2007.03.15 파워포인트파일MS 파워포인트 (ppt) | 45페이지 | 가격 1,000원

소개글

인간의 생활과 가장 밀접하게 있는 것중에 하나가 바로 물이다.
물은 인간 뿐만 아니라 지구 생태계 전체를 조절하는 역할을 하기 때문에 더욱 중요할 수 밖에 없다. 산업혁명이후 빠른 산업 발달 및 경제 성장 등으로 지구는 환경오염에 시달리고 있다. 특히 수질오염은 더 큰 문제로 다가 오고 있다.
수질 오염은 여러 경로에서 발생하는데...

목차

Case Study
Types, Effects, and Sources of Water Pollution
Pollution of Freshwater Streams
Pollution of Freshwater Lake
Pollution of Groundwater
Ocean Pollution
Preventing and Reducing Surface Water Pollution
Drinking Water Quality

본문내용

What pollution water, where do the pollutions come from, and what effects do they have?
What are the major water pollution problems of streams and lakes?
What causes groundwater pollution, and how can it be prevented?
What are the major water pollution problems of oceans?
How can we prevent and reduce surface water pollution?
How safe is drinking water, and how can it be made safer?


Agriculture - Sediment eroded from agricultural lands and overgrazed rangeland is the largest source. - Fertilizers, pesticides, bacteria from livestock and food processing wastes, and excess salt from soils of irrigated cropland.
Industry and Mining - Acidic compounds draining from active and abandoned subsurface and surface mines into streams can kill fish and other aquatic life.


Most of the 209 different PCBs are insoluble in water, soluble in fats, and resistant to biological and chemical degradation-properties that result in their accumulation in the tissues of organisms and their biological amplification in food chains and webs.

참고 자료

Living in the environment, 14th
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