A study coming out in the Proceedings of the National Academy of Science found that in most poor countries, higher temperatures are more than 90% likely to have resulted in a fall in economic output, compared to a world without global warming.
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最近发表在《国家科学院院刊》上的一项新研究对这一乐观前景提出了挑战。
A new study, just published in the Proceedings of the National Academy of Sciences challenges the rosy picture.