Further research into the problem showed that the ozone layer is being destroyed by gases called CFCs.
对此问题的进一步的研究表明一种叫做氯氟烃的气体正在破坏臭氧层。
These gases are released into the atmosphere by the chemicals used in aerosol cans, refrigerators and air conditioners.
喷雾罐和电冰箱中所含的一些化学物质向大气释放这些气体。
To help save the ozone layer, many manufacturers have stopped producing aerosol cans that use CFCs.
为了挽救臭氧层，很多制造商已停止生产使用氯氟烃的喷雾罐。
They have switched to other less harmful chemicals, and labelled their cans 'ozone-friendly' or 'no CFCs'.
他们改用其他毒性较小的化学品，并在罐子上贴上了这样的标签：“不破坏臭氧层”或“不含氯氟烃”。
The problem of refrigerators and air conditioners has been more difficult to solve.
电冰箱和空调的问题更难解决一些。
However, more and more manufacturers are now producing refrigerators and air conditioners that do not use CFCs.
然而，越来越多的制造商现在在生产不使用氯氟烃的电冰箱和空调。
Therefore, when you go shopping you should choose ozone-friendly products.
因此，在你购物时，你应该挑选不破坏臭氧层的产品。
Then you will be doing something to help the environment.
这样你就是在做一些保护环境的事情。