TORRANCE, Calif. It is a nibble weird that a guy who describes his relationship to Christmas as "hostile" runs around greater Los Angeles in a floppy red Santa hat and answers his iPhone, "Merry Christmas, this is Scotty Claus!" But bummed as false merriment and gift obligations render him, Scott Martin -- landscape architect and tree hugger in a literal sense -- was unnerved by the sight of post-Christmas trees lying about like so much discarded sausage casing. What people really ought to do, he reasoned, was rent a Christmas tree, and return it, alive, to the nursery after the season.