The World Health Organization has released stringent air pollution guidelines in response to the latest information on the damaging affect on health, but experts say none of the world’s 100 biggest cities would meet the updated rules.
世界卫生组织(WHO)发布了严格的空气污染指导方针,以回应有关空气污染损害健康的最新信息,但专家表示,世界100个最大城市中没有一个符合最新规定。
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