@58db300d @3660532c 

b) reforestation gets some carbon back where we want it (in biomass, soils etc), and reduces emissions from degraded areas. So even where it's viable, we don't have the luxury of time to wait for natural regeneration.

For the same amount of a money, you can regenerate *much* more land into native forest than plant it, in landscapes that still have some native forest to act as seed sources. Still, yes, it’s all very case and context dependent.