Last week the concentration of carbon dioxide in the atmosphere was reported to have passed 400 parts per million for the first time in 4.5m years. It is also continuing to rise at a rate of about 2 parts per million every year. On the present course, it could be 800 parts per million by the end of the century. Thus, all the discussions of mitigating the risks of catastrophic climate change have turned out to be empty words.
據報道，上週，大氣中的二氧化碳濃度超過400ppm，這是450萬年來的第一次。二氧化碳濃度還在繼續以每年約2ppm的速度升高。根據目前的趨勢，到本世紀末，二氧化碳濃度可能會達到800ppm。也就是說，事實證明，所有那些有關減輕災難性氣候變化風險的討論都是空話。
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