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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Article 44. The State shall adopt total emission control system for key pollutants.

第四十四条国家实行重点污染物排放总量控制制度。

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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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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