Of course there are no trees on Mars! The chainsaws are present because of a massive in-house ice sculpture contest that took place just prior to hell being unleashed.
Why bother creating multiplayer maps with lights that can be shot out? Just create the maps with no lights to begin with... I have a few underway already... you have to see them to really appreciate 'em. The first one is called Wonder Vs. Charles. The second one I call Wait Until Dark.