From wooden buildings to air filters – how green cities could remove CO2 from the atmosphere
More than a thousand cities around the world now have #NetZero pledges: they want to emit only as much #CO2 into the atmosphere as they can simultaneously recapture.
Technically speaking, urban removals of this most important #GreenhouseGas could add up to one gigatonne (i.e. 1,000 million tonnes) per year by mid-century.
