Comment by myrmidon

Thats an even bigger area than I imagined... Another big problem is that we'd have to grow those forests again after 20 years, because mature trees stop being a CO2 sink.

The numbers/ratios should be even worse for Europe where the population density is higher. But I can totally see the approach working after scaling CO2 emissions down.

I think going over single digit percentages of land area in forestation levels is already politically almost impossible-- agriculture alone is gonna meet any such attempt with ridicule at best and copious amounts of buckshot at worst...