They give off a lot of greenhouse gases (especially CO2) into the air. This warms the earth.

它们向空气中释放大量温室气体（尤其是二氧化碳）。这使得地球变暖。

youdao

It still has much to offer, especially in helping to solve one of the very problems from which it suffers itself, CO2-induced global warming.

它仍有很多东西可以提供，特别是在帮助解决一个海洋自身正在遭受的问题上，即由CO2引起的全球变暖。

youdao

The current situation of environment pollution problem caused by boiler is presented, ant the method and content of boiler decarbonization are introduced, especially the recovery and disposal of CO2.

分析了现有锅炉存在的环境污染问题，介绍了锅炉脱碳的方法与内容，着重讨论了CO2的回收利用与处置。

youdao

These are already cheaper and cleaner than burning coal, oil and gas with all their pollutants, especially CO2.

WSJ: The New Nuclear Revolution

"Given the pressing need to reduce our dependence on fossil fuels, especially oil, and to cut CO2 emissions, the future for hydrogen as an alternative means of storing and utilising energy cost-effectively has never been brighter, " said Jim Heathcote, chief executive of ITM.

BBC: Hydrogen refuel station unveiled

Absorption is particularly fast in cold water so the Arctic is especially susceptible, and the recent decreases in summer sea ice have exposed more sea surface to atmospheric CO2.

BBC: Arctic Ocean 'acidifying rapidly'