Molecules into stone
In September 2021, Climeworks activated Orca on a lava field outside Reykjavik. It pulls 4,000 tons of CO2 from the atmosphere annually and mineralizes it into basalt. Permanent removal. Not an offset. Molecules extracted from the sky and locked into rock. Four thousand tons against forty billion is a rounding error. We know. But does the rounding error represent a category of technology that changes everything?
Solar panels slow the accumulation of CO2. Direct air capture removes it. Synthetic biology produces materials without extracting them. Vertical farms grow food without soil. Precision fermentation makes protein without animals — a step toward the world without eating animals that matters for reasons beyond ethics. These are not incremental improvements. They are a different relationship between economic activity and physical reality.
Nobody in this debate distinguishes between types of growth. An economy that grows by extracting more copper is not the same as one that grows by designing a circuit using less. The green growthers conflate them. The degrowthers conflate them. The conflation is where the argument stalls.
The degrowthers raise Jevons. Previous efficiency gains operated within the same logic — produce more, cheaper. We propose changing the thing itself. When synthetic biology produces spider silk from yeast, it does not optimize silk farming. It eliminates the silk farm. Substitution, not optimization. Does the Jevons framework even apply when you are replacing the system rather than improving it?
The cornucopians like our optimism and hate our specificity. Hope is not a materials science. The climate conversation is littered with people who believe the right things and have no plan.
Where we concede ground: Most of our technologies are pre-commercial. We ask the world to bet on learning curves that have not materialized. The gap is real.
What would change our mind: If DAC still costs above $200/ton by 2035 and precision fermentation cannot compete on price, substitution cannot scale in time.
Read the full synthesis: Can the economy grow forever on a finite planet?