Smoke also contains chemicals that lead to ozone production farther away from the fires.

浓烟中还含有化学物质，这些化学物质使得臭氧产物与大火相隔绝。

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Excess ozone production wastes energy, can accelerate corrosion and result in excessive off gassing in the area of the distribution piping.

过度新鲜的空气制造浪费能源，能加速腐蚀而且造成分配吹笛的区域过度的远气体处理。

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In polluted urban areas, they also enhance production of ozone, a key ingredient of smog that is potentially toxic to animal and plant life.

在受污染的市区，他们还促进臭氧的产生，臭氧是对动物和植物生命有潜在毒性的烟雾的关键成分。

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Natural factors such as forest fires further affect air quality by emitting carbon monoxide and other gases that lead to the production of ozone.

CNN: Canadian forest fires add to U.S. pollution

The Montreal Protocol is the international agreement designed to protect the ozone layer by phasing out production of Cfc's and halons.

BBC: News | Sci/Tech | Ozone hole reaches record size

In fact, ozone levels have declined even as production has dramatically increased in the Barnett shale.

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