conservationist

conservationist
    n 1: someone who works to protect the environment from
         destruction or pollution [syn: {environmentalist},
         {conservationist}]
    

44 Moby Thesaurus words for "conservationist":
      Audubon Society, National Wildlife Service, Sierra Club,
      arboriculturist, conservatist, conservative, conservator,
      deliverer, diehard, fogy, forest ranger, forester, game warden,
      keeper, laudator temporis acti, lifesaver, logger, lumberjack,
      lumberman, mossback, old fogy, old school, preservationist,
      preserver, ranger, rescuer, right-winger, rightist, safekeeper,
      saver, savior, silviculturist, standpat, standpatter,
      stick-in-the-mud, taxidermist, timberman, tree farmer,
      ultraconservative, wood chopper, woodcraftsman, woodcutter,
      woodman, woodsman