Carbon Engineering already captures CO2 for $100/tonne. They published a paper on it https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 https://www.cell.

Carbon Engineering already captures CO2 for $100/tonne. They published a paper on it https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 http://carbonengineering.com/ http://carbonengineering.com/ “Individual DAC plants can be placed in any country and in multiple climates, and can be built to capture one million tons of CO2 per year. At this large scale, our technology will be able to achieve costs of $100-150 USD per ton of CO₂ captured, purified, and compressed to 150 bar.”