比如环境污染，交通拥挤，需特殊处理废物的激增，以及由此造成的负面心理及社会影响。
Such as environmental pollution, traffic jams, the proliferation of waste requiring special handling, and the resulting negative psychological and social impact.
医疗专家能够支持一些机构，比如美国肺病协会和美国胸科学会，当他们致力减少环境污染。
Health professionals can support organizations, such as the American Lung Association and the American Thoracic Society, as they endeavor to reduce air pollution.
比如，世界最好的马拉松选手就威胁说因环境污染问题而退出此次北京奥运会。
The world's fastest marathon runner, for one, has threatenedto drop out of that race because of pollution.
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