United Nations Secretary-General Antonio Guterres said it’s now "crunch time" for negotiators at the COP27 climate summit. Talks are expected to stretch into this weekend. We hear from a young climate activist from Pakistan who's spent the last two weeks taking part in the climate conference in Egypt. Fatemah Sultan, 19, talks with The World's environment correspondent Carolyn Beeler about her motivations for taking part in COP27, and some of the takeaways she'll bring back home.
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