On: Robotic 'trees' can turn CO2 into concrete

[daveFNbuck]

Concrete production accounts for about 5% of CO2 emissions, so this does reduce emissions.

[hinkley → daveFNbuck]

And turning a source into a sink is better than stopping. Assuming that this process takes more energy than the current process, you could still be looking at a target of, say, 8% reduction of anthropogenic carbon.