Cheaper carbon capture is on the way

Using the word “cheap” and the expression “carbon capture” in the same sentence requires significant gall. Filtering something thats as rarefied as  0,04% substance out is a challenge in itself. Imagine, they would have to process 2500 m3 of air to capture one m2 of CO2. The power to move that amount of air alone must be mind-boggling. How much carbon emissions will this require by the way?