Since the process is driven by heat rather than electricity, it could reduce greenhouse-gas emissions even further by using energy-efficient sources of heat.

因为这个过程是热驱动而不是电力，通过使用能量转化率高的热源，可以大大减少温室气体排放。

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To reduce air convection, heat sources inside the enclosure are minimized.

减少空气对流，热源在封入物里面减到最小。

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Any policy to reduce heat-trapping pollution will inevitably target the main sources of Americans' energy: the coal burned by power plants for electricity and the oil that is refined to run automobiles.

NPR: PROMISES, PROMISES: Climate Change