Climate
Carbon Removal at the Scale That Matters
Direct air capture works in a press release. Making it work at gigatonne scale is a different physics — and economics — problem.
by Dr. Ade Okonkwo, Climate Systems · May 7, 2026 · 10 min read
Capturing a tonne of CO₂ from the air is no longer in doubt. Capturing a billion of them, every year, for a price the world will actually pay, remains the defining engineering challenge of the decade.
The thermodynamics are unforgiving: atmospheric CO₂ is dilute, and concentrating it costs energy that must itself be carbon-free, or the exercise is self-defeating.
The most credible pathways pair capture with cheap, otherwise-stranded renewable energy and with mineralization that locks carbon away on geological timescales.
What we lack is not a prototype but an industry — supply chains, standards, and a price on carbon honest enough to fund them.