We do that on a small scale: https://en.wikipedia.org/wiki/Carbon_dioxide_removal#Direct_air_capture https://en.wikipedia.org/wiki/Carbon_dioxide_removal#Direct

We do that on a small scale: https://en.wikipedia.org/wiki/Carbon_dioxide_removal#Direct_air_capture https://en.wikipedia.org/wiki/Carbon_dioxide_removal#Direct_... - "a pilot plant in British Columbia, Canada that has been in use since 2015[51] and is able to extract about a tonne of CO2 a day.". CO2 is in the atmosphere at 400 parts per million, i.e. to get 400Kg of CO2 out you need to suck 1,000,000Kg of air through (at minimum, assuming you can get every single CO2 molecule out), which sounds like a lot of matter to move and a power-hungry approach. The world emits about 37 billion tons of CO2 per year which is 33.5 billion Kg, so we need 90 million of those pilot plants to remove a year of CO2 in 365 days of operation, at a cost of $0.3T to $0.6T per year.