It's absolutely non-trivial. Have you walked through planned pine forests? There is vast swathes of them around where I live in Scotland and there is no bio-diversity there at all. They are planted so close that the canopy coverage allows very little sunlight to the forest floor, and even if it did not much could grow because of the heavy littering of dead needles that cause very acidic soil. At best you will find patches of lichens and ferns and some squirrels and martins / other rodents.
Also working plantations are usually not available for public access for a portion of the year so they're not actually providing much quality of life for local people, which if you're going to go commit to large scale reforestation plans should be a considered part.
Also working plantations are usually not available for public access for a portion of the year so they're not actually providing much quality of life for local people, which if you're going to go commit to large scale reforestation plans should be a considered part.