加拿大最大的城市已经率先使用这一想法来取代利用电力来进行空气调节，在这里可利用的冷却资源供给可以直接从环境中获得。
Canada's largest city has been pioneering the idea that instead of using electricity to power air conditioning, a useful supply of cold can be directly extracted from the environment.
例如，塔中心设计成一种烟囱的样式，保证空气流通，用以供给自然通风。
For example, the central tower will serve as a kind of chimney that keeps air flowing to provide natural ventilation.
环境保护主义者关于人口问题的归责长期唇枪舌剑争论不休：人口总量即与之对应的供给人口需要的水、食物、矿产和清洁的空气总量等等。
Environmentalists are arguing in circles about who or what is to blame: the total number of people; or the amount of water, food, mineral ores or clean air each demands.
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