一种可选的办法，具有讽刺意味，是用二氧化碳替代在这类系统中使用的合成氟化烃制冷剂，他说：这类气体造成全球变暖的可能性是二氧化碳的四千倍。
One option, ironically, is to use carbon dioxide to replace the synthetic HFC refrigerants used in such systems, he says: such gases can have around 4000 times the global warming potential of CO2.
各种废气，像二氧化碳、甲烷以及破坏臭氧层的氟利昂制冷剂，都可能捕捉阳光，提高地球上的温度。
Waste gases such as carbon dioxide, methane and the same CFCs that wreck the ozone layer all tend to trap sunlight and warm the earth.
一种空调装置的清洗方法等，在使用二氧化碳作为工作制冷剂时，不用进行抽真空，就能降低残留的杂质的量。
Provided is a method for cleaning an air conditioner, by which a quantity of remaining impurities is reduced without vacuumizing, in the case of using carbon dioxide as an operating coolant.
使用二氧化碳作为工作制冷剂的空调装 置（1）的清洗方法包括三个步骤。
The method is provided for cleaning the air conditioner (1) which uses carbon dioxide as an operating coolant, and the method has three steps.
使用二氧化碳作为工作制冷剂的空调装 置（1）的清洗方法包括三个步骤。
The method is provided for cleaning the air conditioner (1) which uses carbon dioxide as an operating coolant, and the method has three steps.
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