4 ms·
To your first point: correct. But the concentration in air is so bloody low for any chemical process (air is <0.5% CO2) that you'll have to put in huge amounts
by semi-extrinsic 9y ago
To your first point: correct. But the concentration in air is so bloody low for any chemical process (air is <0.5% CO2) that you'll have to put in huge amounts of energy. It's not going to be economically feasible.
To your second point: capturing CO2 and then re-emitting it is completely off the table. It will be (or already is, depending on your interpretation of Directive 2008/98/EC) banned in Europe, likely with an exception for greenhouses (where they need to use CO2 for growing plants, and currently get it from burning natural gas).