The Physalia is a self-sufficient ecosystem that generates all the power it needs from the sun and works to reduce water pollution through bio-filtration .

这个巨型浮囊内部有一套自给自足的生态系统，其利用太阳产生自身所需的能源，并通过生物过滤来减少水源污染。

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The Physalia is a self-sufficient ecosystem that generates all the power it needs from the sun and works to reduce water pollution through bio-filtration.

这个巨型浮囊内部有一套自给自足的生态系统，其利用太阳产生自身所需的能源，并通过生物过滤来减少水源污染。

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Aim to analyze the reason that pollution of Huaihe River valley are getting more serious, to give advices to reduce water pollution of Huaihe River valley.

目的分析淮河流域水污染更加严重的原因，提出消除水污染的建议。

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The Executive Order commits Federal agencies to lead by example toward a clean energy economy, and sets targets to reduce greenhouse gas pollution, increase energy efficiency, reduce fleet petroleum consumption, conserve water, reduce waste, support sustainable communities, and leverage Federal purchasing power to promote environmentally-responsible products and technologies.

WHITEHOUSE: Browse White House visitor logs

The administration has been sharply criticized for scuttling or scaling back Clinton administration steps to reduce arsenic levels in drinking water and impose new pollution standards on miners, and for abandoning a Bush campaign pledge to regulate carbon dioxide emissions from power plants.

CNN: Bush to leave Clinton lead standards in place

MTBE, an additive mixed with petrol to reduce air pollution, had caused it to leak into water supplies.

ECONOMIST: Business this week