水挖掘机工作视频表演:谁知道关于environmental issue的相关资料

http://northstar.sierraclub.org/campaigns/air/coal/wrongWithCoal.html
http://www.umich.edu/~gs265/society/waterpollution.htm

Particulates from dirty coal result in deaths to MINNESOTA CITIZENS

A landmark study completed several years ago by Harvard researchers found a 37 percent higher risk of death from cardiopulmonary disease and a 37 percent higher risk of death from lung cancer in cities with the most fine particulate pollution as compared with the least polluted cities, after taking into account personal risk factors, such as smoking.

Oil pollution is a growing problem, particularly devestating to coastal wildlife. Small quantities of oil spread rapidly across long distances to form deadly oil slicks. In this picture, demonstrators with "oil-covered" plastic animals protest a potential drilling project in Key Largo, Florida. Whether or not accidental spills occur during the project, its impact on the delicate marine ecosystem of the coral reefs could be devastating。

Comprising over 70% of the Earth’s surface, water is undoubtedly the most precious natural resource that exists on our planet. The pollution of rivers and streams with chemical contaminants has become one of the most crutial environmental problems within the 20th century. Waterborne chemical pollution entering rivers and streams cause tramendous amounts of destruction.