美国东西两岸的港口，也在努力减低货运设备以及卡车的废气排放。
The ports around the U.S. are also trying to reduce emissions in cargo handling equipment and trucks.
这套设备利用了水泥窑在生产时排放出的废气中的热量，通过热交换的原理，既晾干了水泥熟料，又加热了锅炉里的水，从而形成水蒸气，最后推动涡轮转动发电。
The system USES the heat from waste gases produced in the kiln during the cement-making process both to dry the cement and to heat water in a boiler that drives a turbine to produce electricity.
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