Section 05 ยท 4 pages
Not proven
And who says so.

Every page in this section
- Not proven, and who says soDirect air capture works at pilot scale and its cost at climate scale is disputed by people with no axe to grind; the disagreement is the story.
- The energy penaltySeparating a gas that is 0.04 per cent of the air costs energy that has to come from somewhere, and that arithmetic decides everything.
- Where it goes afterwardsCapture is only half a process; the storage half needs geology, monitoring and a very long time.
- Pilots, and what they proveA pilot demonstrates that something can be done, not that it can be done cheaply or often, and conflating the two is the commonest error in the field.