From the Australian Broadcast Corporation:
Planet Slayer - Greenhouse Calculator
It's a cute game designed for children. You answer 11 questions and click the skull and crossbones to find out when you should die for the good of the planet.
Note, if you play with the numbers a bit, "you can live forever."
And if you look a little harder, you'll find that your chance at eternal life increases a lot if you invest in "ethical" businesses.
Just remember, the website (which I think is run by the government down there) tells us it is all true. . . .