bromopropane is a substitute of ozone- depleting chlorofluorocarbons. It is widely used in many fields due to its advantages.
溴丙烷是臭氧层破坏物——氟利昂类物质的替代物，由于其固有的优点而得到广泛的使用。For the first method, each house has a separate refrigerating unit, Freon as the refrigerant evaporates in the cooler to cool the air.
以往的冷库中冷源有两种方式，一种是氟利昂机组单机对单个冷库直接制冷方式，一种是乙二醇间接制冷方式。Recently, every country faces the problems of energy shortage and ozone layer protection from Freon at different level.
近年来世界各国都不同程度的面临着能源紧张和保护地球臭氧层免受氟利昂破坏的问题。If the CFC phaseout proceeds on schedule, the atmosphere should start repairing itself by the year 2000, say scientists.
科学家表示，如果淘汰氟利昂制冷剂能按照进度达成，到2000年时大气层应能开始自我修复。Like CFCs, they are produced by a smallish number of industrial processes, and cutting emissions of them is cheap and easy.
与氟利昂一样，它们由为数不多的工业过程产生，且[减排成本]低廉又[操作]容易。Although CFCs are extremely potent greenhouse gases , they exist in only very small quantities in the atmosphere .
虽然氟利昂是最厉害的温室气体，但它们在大气中的含量非常少。a specialized manufacturer of refrigerants and pesticide fumigants .
专业生产氟利昂制冷剂系列产品和熏蒸剂系列产品。Nonflammable, nontoxic, and noncorrosive, they have low boiling points, which makes them useful as refrigerants.
不可燃、无毒性、无腐蚀性以及低沸点，使氟利昂用作冷冻剂。and were promised that they would receive $250 million from richer nations to pay for the CFC phaseout.
而且获得承诺，可以得到富有国家提供的2.5亿美元经费以逐步淘汰氟利昂制冷剂。