污染 的搜索结果
报告称全球10大空气污染城市7个在中国
[导读]由亚行与众多专家完成的《中国环境分析》报告昨日发布,数据显示世界上污染最严重的10个城市有7个在中国,全国500个城市中,空气质量达到世卫组织推荐标准的不足5个。
http://99dq.net/show.aspx?id=488&cid=31 - 2013-01-15
科学家称气候变化和污染导致北极熊“变小”(图)

  8月26日电 据英国广播公司26日报道,“憨厚敦实”的北极熊是庞然大物,但相对于百年前的祖先,今天的北极熊则属“苗条型”。
  科学家在对比20世纪初期和末期的北
http://99dq.net/show.aspx?id=417&cid=34 - 2009-09-12
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