With a great deal of sewage and garbage being increasingly drained into the sea, great attentions have been paid to the effect of mangrove wetland system on water purification.

随着大量污水、废物源源不断地排放入海，红树林湿地的水体净化功能正日益受到重视。

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They gathered hundreds of sea creatures and water samples to measure the garbage patch's effect on ocean environment.

VOA: special.2009.09.22

It's a useful way to discover more about whatever you happen to be watching currently, while also serving to help you locate interesting content amid a sea of programming garbage.

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His aim during a 100-day voyage that will take him from San Francisco, California, to Sydney, Australia, is to find the "Great Pacific Garbage Patch" between California and Japan -- a massive sea of plastic trash that environmentalists say could soon be larger than the continental United States.

CNN: Environmentalist: It's becoming a plastic world