This is based 2009 data. China will prevail soon

来源: quantnj 于 2013-01-29 11:37:20 [] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: 弄来弄去，民主国家又领先了 由 勿来三 于 2013-01-29 11:30:28

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• By this website, Lanzhou is not too bad. -quantnj- ♀ 给 quantnj 发送悄悄话 (514 bytes) () 01/29/2013 postreply 11:54:25

• each country has only one city selected -野生动物摄影家- ♂ 给 野生动物摄影家 发送悄悄话 野生动物摄影家 的博客首页 (64 bytes) () 01/29/2013 postreply 11:43:34

• 回复：有可能。这份名单不太可信。巴黎比北京污染得厉害? -QinJin- ♂ 给 QinJin 发送悄悄话 (0 bytes) () 01/29/2013 postreply 11:48:58

• They take only city by country. Beijing is not in their sample s -quantnj- ♀ 给 quantnj 发送悄悄话 (0 bytes) () 01/29/2013 postreply 11:55:29

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