STOP CUTTING DOWN TREES
ok, for 1, global warming isn't happening, check something other than the news media people! and secondly, most of our oxygen comes from the algae in the oceans. i'm not for cutting down every tree, but they can be a cheap and effective way to heat your home. and we're always planting more trees for the animals to live in. besides, if you cut down one tree with a disease, it doesn't spread to the rest, making a whole yard of diseased trees. =)