From Jonathan Seagrave
Geoengineering by planting trees on unused farmland to capture carbon is immediately practical (12 October, p 10), but Olive Heffernan’s article on greening of the Arctic in the same issue (p 40) points to an additional approach.
The northward spread of the boreal forest is far slower than the rise in temperature in the region. Accelerating this spread by planting trees at the forest margin would be cheap, and use non-agricultural land away from threat of human damage. It also only requires support from a few governments to access vast areas.
I wouldn’t suggest a return to the gulag, but summer planting camps might occupy idle youth.
Bristol, UK
