Because CFCs are also powerful greenhouse gases.

因为氯碳化物是强大的温室气体。

Because CFCs are also greenhouse gases.

因为氯烃也是温室气体。

On the ground, CFCs aren't harmful.

在地面上，CFC 是无害的。

The 1987 Montreal Protocol phased out the use of chlorofluorocarbons, or CFCs, responsible.

分阶段撤销氯碳化物、氯碳化物、以及其他一些会对臭氧层成破坏的物质的使用。

And back then we used a lot of CFCs.

那时我们用了很多 CFC。

The biggest problem was chlorine from a man-made compound called Chlorofluorocarbons, or CFCs.

最大的问题是来化合物含氯烃中的氯（CFC）。

CFCs were developed in the 1920s by three US-based corporations as coolants for refrigerators.

CFC 是在 1920 年代由三个美国公司开发的用于冰箱的冷却剂。

CFCs could hang around in a planet's atmosphere for a long time.

氯烃会在一颗行星的大气层停留很长一段时间。

The US had already moved away from CFCs in aerosol cans.

美国已经不再使用 CFC 的气溶胶罐了。

The cost of helping developing countries phase out CFCs under the Montreal protocol was just 2.4 billion all-told from 1990-2010.

1990-2010年间，德国根据蒙特利尔议定书，帮助发展中国家逐步淘汰氯碳化物的总成本仅24亿美元。

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“不含氯烃”。

To help save the ozone layer, many manufacturers have stopped producing aerosol cans that use CFCs.

为了挽救臭氧层，很多制商已停止生产使用氯烃的喷雾罐。

In the lower atmosphere, CFCs don't break down or react with other molecules.

在低层大气中，CFC 不会分解或与其他分子发生反应。

NASA's James Webb Space Telescope, due to launch in 2018, should be powerful enough to detect chlorofluorocarbons, CFCs.

将于2018年发射的美国宇航局的詹姆斯韦伯太空望远镜应该强大到足以检测氯化碳, 氯烃。

However, more and more manufacturers are now producing refrigerators and air conditioners that do not use CFCs.

然而，越来越多的制商现在在生产不使用氯烃的电冰箱和空调。

Satellite data revealed the vast extent of these losses and chemical tests confirmed that the cause was unquestionably CFCs.

卫星数据揭露了这些损失的具体程度，而化学测试证实，无疑是 CFC 导致的。

Initial estimates showed that within 60 years, CFCs could reduce ozone concentrations by 7%.

初步估计表明在 60 年内，CFC 可使臭氧浓度降低 7%。

CFCs soon found their way into a variety of everyday items and became a multi-billion dollar per year industry.

CFC 很快就被加入各种日常用品中并成为了一个年收益数十亿美元的产业。

CFCs were added to insulation foam and fire suppression products.

氯化碳被添加到绝缘泡沫和灭火产品中。

When this became known, many manufacturers stopped using CFCs in their aerosol cans.

当这件事为所知时，许多制商停止在他们的气雾罐中使用 CFC。