Comment by rmcginnis

Hi, Rob from Prometheus here! Most of the skepticism about CO2 removal from the air is focused on "carbon sequestration and storage" or CSS, which is mitigation of emissions from fossil fuel by putting CO2 into the ground, for example. Turning CO2 from the air into useful products like fuels and building materials is much more capable of scaling because these products have value independently from regulations or carbon taxes/credits. If you can be the low cost producer of a commodity like gasoline or polyethylene, it's possible to grow zero or negative carbon capture very quickly to very large scale. If all transportation fuels, heating fuels, and plastics were from atmospheric CO2 capture, this would be more than 10 GT of CO2 a year, which is hugely significant.