Black carbon absorbs solar radiation, warming the atmosphere. The researchers calculated this warming effect as 0.9 watts per square metre, second to carbon dioxide's value of 1.66 per square metre.But this is much higher than the 0.2–0.4 watts per square metre estimated by the UN Intergovernmental Panel on Climate Change.
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Second, American power companies are fearful that they will soon have to pay for one particular pollutant, carbon dioxide, as is starting to happen in other parts of the rich world.
其次美国的能源企业担心很快就需要支付二氧化碳排放特别污染费,这笔费用在其他发达国家已经开始收取了。
Second we should plant more trees to take in the carbon dioxide around us.
第二我们应该植更多的树来吸收二氧化碳。
They cite black carbon as the second largest contributor to global warming after carbon dioxide.
他们认为,炭黑是仅次于二氧化碳的全球变暖第二大促进因素。
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