The Earth, Mk. II
Current global consumption levels could result in a large-scale ecosystem collapse by the middle of the century, environmental group WWF has warned. The group's biannual Living Planet Report said the natural world was being degraded "at a rate unprecedented in human history"... It warned that if demand continued at the current rate, two planets would be needed to meet global demand by 2050.
I don't know about the rest of you, but to me, the implications of this are unmistakably clear. There's no time to lose. If we're going to need two planets by 2050, we better get cracking on that Mars colonization program right now!