Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.
气候变化正在发生，是人类造成的，我认为这可能是我们面临的最严重的环境问题。
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Climate
气候变化正在发生，是人类造成的，我认为这可能是我们面临的最严重的环境问题。