I'm actually a fan of 'tree farms': responsible forestry, specific areas of land dedicated to monocultures of useful tree species that are grown, harvested, replanted, and harvested again.

I'm not. Here in Australia they're planted on farm land, and taking that land out of food production. The growing of trees depletes the soil. They grow Bluegums, which are thirsty trees and deplete the water-table. Then the land is abandoned. The food still needs to come from somewhere! Which probably means more forest cleared elsewhere.