You do know — don't you? — that if you put your Christmas tree out on the curb in Philadelphia, it will just go in the trash. Why not give that evergreen more life by taking it to TreeCycling, where it will live on as mulch, and your donation ($10 requested) will support GReen in CHestnut Hill’s Green Warrior Student program and the Weavers Way Environment Committee’s Community Grant fund. (Another option for city-dwellers is to take your Tannenbaum to one of the city's Sanitation Convenience Centers in the first two weeks of January, or on Saturdays, when they always accept yard waste for recycling. Visit www.philadelphiastreets.com/holiday for details.)