Though the trees seem beneficial at first, returning the planet to a lush, wildlife-filled state, their uncontrolled growth produces too much oxygen in the atmosphere, which ignites and burns Earth to a cinder when Bender lights a celebratory cigar.
Though the trees seem beneficial at first returning the planet to a lush, wildlife-filled state, their uncontrolled growth produces too much oxygen much to the concern of Al Gore. The atmosphere ends up igniting and burning Earth to a cinder when Bender lights a celebratory cigar.