This obligation to future generations I think was well symbolized by the tree planting that we started our meeting with.

WHITEHOUSE: The White House

To combat such ads, the Agriculture Department has approved a program that will add a 15 cent fee to each real tree sold, with the funding going toward future marketing campaigns to promote real Christmas trees.

FORBES: Why REAL Christmas Trees Are Back In Style

Future forestry concessionaires will be obliged to attach a bar code to each tree they fell (and the stumps they come from).

ECONOMIST: Forestry

But it could find a future claim to fame in birch syrup, a nontraditional but increasingly popular product pulled from New Hampshire's state tree.

WSJ: Birch syrup explored as add-on to maple industry