The technical key of total emission control is the response relationship between pollution sources and water quality object.

污染物总量控制的技术关键是污染源与水质目标之间的响应关系。

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Benefits such as fuel and energy savings plus lower total emission volumes are realized when air is enriched or replaced with higher-purity oxygen.

使空气变成富氧空气或用高纯度氧替代空气有节约燃料和能量以及更小的总发射体积等好处。

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It is suggested that the total emission of pollutants should be controlled during heavy fog days to avoid the occurrence of heavy pollution events.

有浓雾的天气条件下，建议降低污染物的排放总量，以避免严重大气污染事件发生。

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In other words, for the same present cost, more than three times as much could be cut from the world's total CO2 emission by waiting a couple of decades.

ECONOMIST: A cooling off period

Industrywide minimums are set to step up gradually, from a total of 250 emission-free vehicles between 2005 and 2009 to 50, 000 between 2015 and 2017.

FORBES: Hot Air