Be aware that capturing exhaust CO2 of coal plants is about the cheapest source of CO2 for capturing, as you just need to pre-enrich the air in oxygen to get ne

Be aware that capturing exhaust CO2 of coal plants is about the cheapest source of CO2 for capturing, as you just need to pre-enrich the air in oxygen to get nearly-pure CO2 exhaust. This expensive part is for capturing CO2 out of ambient air, where you only get like 0.04%.