(Carolyn Caster/AP) Greg Kutz, front, and Rebecca Brown carry a tree they cut down through the snow at the Circle M Ranch Christmas tree farm in Harrisburg, Pennsylvania, Saturday, Dec. 5, 2009. The farm sells around 1,500 trees a season. Most of the land used for tree farming is ill-suited to other crops, while farmed trees grow in roughly the same density as natural trees so they absorb similar amounts of carbon dioxide while they're growing.
