请点击收听：Climate Change
演讲文稿 ：https://docs.google.com/file/d/0B7g-PZmqzlFsOWZFcDZxUFVlWDg/edit
关键词：气候变化，温室气体，京都议定书，减排，可持续发展，环境，climate change, greenhouse gases, Kyoto Protocol, emission reduction, sustainable development, environment
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