"For the air quality, what we are talking about is not only the sort of traditional pollutants as you could imagine them," he noted. "But, it is also many of the gases, which are the greenhouse gases that are also influencing the quality of the air when they are abundant in the lower atmosphere."
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Though air pollution is by far the most menacing for humans, water quality has similarly been getting better.
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。
The new information could even be useful in parts of the United States or Western Europe where surface monitors, still the gold standard for measuring air quality, are sparse.
这些新的信息对于美国或西欧一些地区也将大有裨益，那些区域长久以来都使用地表探测器的结果作为衡量空气质量的标准。
But later this year it will close, a casualty of the drive to improve Beijing's air quality for the Olympics.
但是今年晚些时候，它将被关闭，成为推动改善北京奥运会空气质量的牺牲品。
A spokeswoman for the mayor's office, Joanna Dovan,says the Pittsburgh area has been working to improve its air quality.
VOA: special.2009.07.13
A spokesperson for the Cruise Lines International Association says other air quality depends on the requirements of the nation where a ship was built.
VOA: special.2009.07.14
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