He noted that most of the world's total carbon emissions stem from cities and sources like buildings, transportation and waste, over which at least limited control can be exerted.

他注意到全球所有碳排放都来自于城市和建筑、交通以及废弃物等来源，对这些来源至少可以加以控制。

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Total quantity control means limiting measures that are formulated for total allowable emissions quantities of air pollutants within a certain area in order to effectively improve air quality.

总量管制：指在一定区域内，为有效改善空气品质，对于该区域空气污染物总容许排放数量所作之限制措施。

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