As well as rapidly reducing the carbon dioxide that we humans are pumping into the atmosphere in huge amounts, recent scientific assessments of climate change have all suggested that cutting emissions alone will not be enough to keep global temperatures from rising more than 1.5 or 2 degrees C. The Intergovernmental Panel on Climate Change and others have all stated that extracting CO2 from the air will be needed if we are to bend the rising temperature curve before the end of this century. These ideas are controversial with some seeing them as a distraction from the pressing business of limiting emissions of CO2. ‘Step forward’ in sucking CO2 from air Climate’s magic rabbit: Pulling CO2 out of thin air But a new assessment from the US National Academies of Sciences, Engineering and Medicine says that some of these "negative emissions technologies" are ready to be deployed, on a large scale, right now. The authors point to the fact that the US Congress has recently passed the 45Q tax rule, which gives a $50 tax credit for every tonne of CO2 that’s captured and stored. So their study highlights some technologies that are available at between $20 and $100 […]

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