Individual that plants trees and will not cut them down where they are not indigenous, especially in Western United States. This results in disastrous forest fires that, ironically, burns down the tree huggers home. Enraged by this, tree hugger then torches large SUV's in car lots, releasing incredible amounts of toxins into the atmosphere. Can usually be found in upscale coffee bars and protesting at world economic summits.
Bob loved junk science because it went hand in hand with being a tree hugger.