因为森林能吸走空气中的碳污染，所以现在它们变得越来越受欢迎了。
Nowadays forests are increasingly welcome because they suck in carbon pollution from the air.
正如报纸上所报道的，北京和武汉等大城市的空气污染已经变得越来越严重。
As is reported in the newspaper, the air pollution in some big cities, such as Beijing and Wuhan, has become more and more serious.
虽然空气污染是到目前为止对人类的最大威胁，但是水质量已经类似地变得更好。
Though air pollution is by far the most menacing for humans, water quality has similarly been getting better.
但这一进步又带来了新问题：这么多的小轿车使交通变得越来越糟，空气污染也很严重。
But this progress brought new problems: With all the cars, traffic was getting worse and worse, and pollution was ter-rible.
有太多的汽车摘要在山、空气变得污染了。
There are too many cars in Lu Shan and the air is becoming polluted.
但是当一个国家开始工业化的时候，以及当人民变得呼吁能够付得起清洁的水与空气的时候，同时污染就增加起来了。
But while pollution can increase when a country starts industrializing, as people get wealthier they can afford cleaner water and air.
在涉及空气污染时，问题可能就不仅仅是随着人身体状况的恶化，他们就会变得更加抑郁。
Where air pollution is involved, the problem may not only be that as people's physical symptoms worsen, they become more distressed.
直接的解决之道是令燃煤发电变得更加清洁，而且这正是西方国家里的那些公用事业公司们多年来为达日渐苛刻的空气污染的标准所不断努力的方向。
The obvious solution is to make coal-fired generation cleaner. And that's what utilities in Western countries have been doing for years, to comply with ever stiffer air-pollution standards.
这里的空气中有大量的污染物质，以致呼吸都变得很危险。
There's so much pollution in the air here that it's becoming dangerous to breathe.
假如我是一个发明家，我会发明一个空气净化器，把各地的空气都变得清新起来，让地球没有大气污染。
If I were an inventor, I will invent a air purifier, around the air becomes pure and fresh, let the earth no atmospheric pollution.
某些空气污染物在光化学反应中变得活性更强，形成有毒的化合物。
Certain air pollutants become more reactive and form noxious compounds in photochemical reactions.
因此，许多河流和湖泊被污染，在一些地区，空气也变得肮脏的和有害的。
As a result, a lot of rivers and lakes are polluted, and in some areas, the air also becomes dirty and harmful.
然而，随着越来越多的废气排放是汽车、空气污染问题变得更加严重。
However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious.
近年来，许多国家都变得更加意识到每个国家所面临的环境问题，如空气和水的污染。
In recent years, many nations have become more aware of the environmental issues each nation faces, such as air and water pollution.
然而，随着越来越多的废气排放是汽车、空气污染问题变得更加严重。
However, with more and more waste gas being discharged by the cars, the problem of air pollution bees even more serious.
某些空气污染物在光化学反应中变得活性更强，形成有毒的化合物。
Certain air pollutants (see smog) become more reactive and form noxious compounds in photochemical reactions.
它表示将集中研究室外污染的影响，主要是由于在未来几十年里空气将变得更糟。
It said it focused on the effects of outdoor pollution specifically because it's expected to get worse in the coming decades.
你有没有注意到天气一年比一年变得还要暖和了呢？简言之，那是因为空气污染的缘故。
Have you noticed that it's getting warmer and warmer every year? To put it simply that's because of air pollution.
然而，随着越来越多的废气排放是汽车、空气污染问题变得更加严重。所以现在我们提倡过低碳的生活。
However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious.
但这一进步又带来了新问题：这么多的小轿车使交通变得越来越糟，空气污染也很严重。
But this progress brought new problems: With all the cars, traffic was getting worse and worse, and pollution waster-rible.
仅19天之后，暴露在污染空气中的孕鼠的肺和肝脏变得更重，且出现加重的组织炎症状况。
After only 19 days, the lungs and livers of pregnant rats exposed to the polluted air were heavier and showed increased tissue inflammation.
随着城市自身的增长，公共机构、企业和城市市民扭转现有空气污染趋势的压力也变得更大。
The pressure on public officals, corporations and urban citizens to reverse established trends in air pollution is likely to grow in proportion with the growth of cities themselves.
随着城市自身的增长，公共机构、企业和城市市民扭转现有空气污染趋势的压力也变得更大。
The pressure on public officals, corporations and urban citizens to reverse established trends in air pollution is likely to grow in proportion with the growth of cities themselves.
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