Environment on our part, is not purely physical environment, which not only shade, increase humidity, provide oxygen, reduce noise, but also gives a sense of beauty, self-cultivation.

环境对我们来讲，不单纯是物质的环境，它不但能遮阴、增加湿度、提供氧气、消减噪音，还能给人以美感、修身养性。

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CPR,or cardiopulmonary resuscitation, can save a life and reduce the risk of brain damage from loss of oxygen.

VOA: special.2009.06.09

Managers said the special rooms will have small amounts of nitrogen piped into them to reduce the oxygen content in the air, so fires cannot start.

BBC: 'Fire-free' rooms at Birmingham library protect archive

Science fiction writers tell us about astronauts put into suspended animation on long trips to the stars, their metabolism slowed to a crawl to reduce food and oxygen requirements.

FORBES: How to Cheat Death

Corus said the investment would reduce C02 emissions by reusing gas generated inside the Basic Oxygen Steel (BOS) plant.

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