Paul Hessburg-Why wildfires have gotten worse -- and what we can do about it

生态保护灾难TED Talks自然带字幕
14.3分钟 2377次

山林火灾频繁发生，我们该如何保护生态平衡？

  • 时长：14.3分钟
  • 来源：互联网 2017-11-09

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