全球变暖的证据。
如比，他们中只有23%的人认为有确凿的证据证明人类活动引起全球变暖；
Only 23% of them accept that there is solid evidence of man-caused global warming, for example;
哪里有证据表明“数百万的科学家认为全球变暖是人为的”？
Where is the evidence that millions of scientists agree that global warming is man made?
哪里有证据表明“数百万的科学家认为全球变暖是人为的”？
Where is the evidence that millions of scientists agree that global warming is man made?
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