Chimney emitting smoke



2009年哥本哈根气候变化会议引入了承诺-评估程序,各国单方面决定减排多少。结果,美国和一些新兴经济体首次做出减排承诺。但这一系统也有极大的缺陷。它没有解决经典 的免费搭车问题,也无法保证发展中国家的减排。事实上,一些国家为了维持强势谈判地位,被鼓励做得更少一些。


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