看看全世界的空气. 真不懂米国人为啥天天猛吹三哥.

来源: 于 2014-10-28 19:26:36 [旧帖] [给我悄悄话] 本文已被阅读：次
worst cities for air pollution, according to the WHO.

air-pollution-by-city

Exposure to air pollution is getting worse in parts of the world,