So I’m aware that there’s a problem with “just planting trees and expecting everything to work out”. Things like growing wrong trees.

But I assume they’re planting native trees, so what exactly is the problem?

Polar bears don’t find food as readily as Grizzly bears. If a Grizzly hesitates on a salmon, it’ll find another salmon.

If a Polar hesitates on a penguin, it could starve.