Based on the movement characteristics of the contaminants released by human, points out that displacement ventilation is more efficient than mixing ventilation w...

结合人体释放污染物的气流运动特性，指出以排除人员活动区内人体释放污染物为目的时，置换通风较混合通风更为有效。

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Helsinki Airport, for example, has cut its carbon dioxide emissions by nearly 2, 500 tonnes compared to 2011, by making heating, ventilation and lighting more energy-efficient, as well as using electrically-operated vehicles.

BBC: Airports doing more to go green