最近，斯坦福大学根据其对全球变暖、环境污染、供水系统、土地利用、野生生物及其他关注点的深入研究，发布了一份2009报告，对能源系统进行了排名。
Most recently, a 2009 Stanford University study ranked energy systems according to their impacts on global warming, pollution, water supply, land use, wildlife and other concerns.
报告指出，因为儿童的肺部和免疫系统还在发育，所以空气污染对儿童的威胁最为严重。
Air pollution is an especially serious threat for children because their lungs and immune systems are developing, the report said.
近年来，时常发生的严重雾霾令航班延迟，导致普遍的呼吸系统疾病，甚至有报告说，空气污染导致中国居民的寿命缩短数年。
Regular levels of intense smog in recent years have postponed flights, caused widespread respiratory problems and been found to cut years off the lives of the country's citizens.
中国的河流系统遭到同样的困境，而中国水利部报告显示，中国70%的河流和湖泊被污染。
China's river systems suffer a similar predicament, with the Chinese Ministry of Water Resources reporting that 70 per cent of China's rivers and lakes are polluted.
中国的河流系统遭到同样的困境，而中国水利部报告显示，中国70%的河流和湖泊被污染。
China's river systems suffer a similar predicament, with the Chinese Ministry of Water Resources reporting that 70 per cent of China's rivers and lakes are polluted.
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