O'Hare is probably the most pointless villain I've ever seen in any movie. Why is he afraid of trees driving him out of business? There is only one seed, even in a best case scenario it would take decades to grow even a handful of trees. He'd be dead before the forest came back.

More realistically he'd be the one funding Ted and every bottle of O'Hare Air would say something about how buying it will help fund the revival of the Truffula Forest.