环保专家称，农场燃烧秸秆时生成的烟雾为印度首都最严重的空气污染贡献了四分之一的污染物。
Smoke from the farm fires contributed about one quarter of the levels of the most dangerous air pollution in the Indian capital, environmental experts said.
地球上的大气自然的受到沙尘暴和火山喷发的尘埃和气体的污染。但是最严重的空气污染确实人为的。
The earth's atmosphere is polluted naturally by sandstorms and the dust and gases from volcanoes. but the most serious kind of air pollution comes from people.
状况并不乐观。煤堆靠著北京的餐厅墙壁，提醒了我们中国最严重的空气污染成因。(环境健康观察)。
Odds stacked against them. Coal briquettes stacked against a restaurant in Beijing are a reminder of the cause of China's worst air pollution. (Environmental Health Perspectives.)
空气污染仍然是最严重的。
这里能源储备虽然丰富，但过于依赖煤炭使黄土地成为全世界空气污染最严重的地区之一。
It has rich energy reserves, but over-dependence on coal accounts for some of the world's worst air pollution.
研究人员只是按照人们所居住的地点以及空气污染最严重的地区对潜在影响进行了研究。
Researchers have only studied the potential impact based on where people live and where air-pollution levels are highest.
使用户可以避开空气污染最严重的地区和时间。
Allow users to avoid locations and times of day when air pollution is worst.
20世纪90年代，空气污染时最严重时（如图所示），臭氧这种最常见的污染物的平均浓度大约是安全浓度的一半。
The average concentration of ozone, one of the most common pollutants, is about half its level in the early 1990s, when the air was at its dirtiest (see chart).
20世纪90年代，空气污染时最严重时(如图所示)，臭氧这种最常见的污染物的平均浓度大约是安全浓度的一半。
The average concentration of ozone, one of the most common pollutants, is about half its level in the early 1990s, when the air was at its dirtiest (see chart).in.
报告指出，城市中的空气污染问题最严重，但是乡下的空气质量比许多人想象中还糟。
The problem is most acute in cities, the report found, but air in rural areas is worse than many think.
呃，我想空气污染是最严重的。天空不再是蓝色的，反而总是灰蒙蒙的。你呼吸的时候会有困难。
Well, I guess air pollution is the most serious. The sky is not blue any longer. Instead, it's always gray. You will have difficulty in breathing?
空气污染最严重地区分别是中国的临汾、兰州和乌鲁木齐，俄罗斯的马格尼托哥尔斯克，以及墨西哥城。
Thee worst places for air pollution were Linfen, Lanzhou and Urumqi in China, Magnitogorsk in Russia and Mexico City.
我在的城市有很多污染。在这些污染中，最严重的当属空气污染；其他的污染还有水源和噪音污染。
In my city, there're some pollutions. Among them, the most serious one is the air pollution and others are water pollution and noise pollution.
你因为空气污染太严重不想去你最喜爱的餐厅吃午餐吗？
You don't want to go to your favorite restaurant for dinner because the pollution is bad?
空气污染最严重地区分别是中国的临汾、兰州和乌鲁木齐，俄罗斯的马格尼托哥尔斯克，以及墨西哥城。
The worst places for air pollution were Linfen, Lanzhou and Urumqi in China, Magnitogorsk in Russia and Mexico City.
生活在空气污染最严重地区的妇女，罹患乳腺癌的危险是空气污染最轻地区妇女的两倍。
Women living in the areas with the highest levels of pollution were almost twice as likely to develop breast cancer as those living in the least polluted areas.
在北京上一次遭遇史上最严重空气污染之后没几天，IBM就开始着手为城市打造更加强大的污染监测和预报体系，此举引发了广泛关注。
Just days after Beijing's worst day of air pollution in recent history, IBM is highlighting its efforts to build stronger pollution monitoring and forecasting systems for cities.
空气污染是最严重的一种污染了。
空气污染是最严重的一种污染了。
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