目前，据估计飞机排放出的二氧化碳约占全球二氧化碳总量的2%。

At present aircraft emissions are estimated to account for about 2% of the total world CO2 emissions.

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透过二氧化碳总量管制与排放交易机制(cap - and - trade scheme)，欧盟已经限制了温室效应气体的排放，去年又为碳撷储颁布进一步的优惠诱因。

The European Union, which already restricts greenhouse-gas emissions through a cap-and-trade scheme, unveiled further incentives for CCS last year.

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换句话说，互联网排放了将近3亿吨的二氧化碳——几乎与土耳其或波兰一年当中燃烧煤、石油和天然气产生的二氧化碳总量相当，或者和英国燃烧化石燃料产生的二氧化碳总量的一半相当。

Put another way, the internet releases around 300m tonnes of CO2 – as much as all the coal, oil and gas burned in Turkey or Poland in one year, or more than half of those burned in the UK.

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