That’s why I said care. A tree as part of a larger garden in an area where insects and animals can reach it probably is good, but a palm tree in a sterile concrete swimming pool zone is unlikely to help and putting in a ton of invasive plants could actually be a problem. Ideally the incentives could be set based on support for native flora and fauna to discourage attempts to game it. If it’s linked to a tax cut, you’ll see every possible bad faith interpretation tried at least once.