See my sibling comment to the parent. Doubling forests won't do near enough, because the carbon we've burnt comes from millions of years of forests compacted into coal (among other sources). We'd need to grow millions of years worth of forests, which we just physically don't have the surface area for.
Its regionally complicated because increased tree cover can lower albedo (reflectivity of radiation) which offsets the co2 removal benefits. Forrests can tip from co2 sinks to co2 sources which is happening in different regions of the world currently.
See my sibling comment to the parent. Doubling forests won't do near enough, because the carbon we've burnt comes from millions of years of forests compacted into coal (among other sources). We'd need to grow millions of years worth of forests, which we just physically don't have the surface area for.
Its regionally complicated because increased tree cover can lower albedo (reflectivity of radiation) which offsets the co2 removal benefits. Forrests can tip from co2 sinks to co2 sources which is happening in different regions of the world currently.