If we all evolved from "pond scum" billions of years ago and have no reason for being here outside of some HUGE "accident" then why do you give a crap if "Mother Nature" decides to ward us off like the parasites we are (according to many of the far left) and rid the human race from this planet?
I mean, why would it matter to you at all if in 100 years there is no more life on this planet? Wouldn't that be, after all, the greatest form of "Survival of the fittest"? e.g. "Just Mother Nature doing some house cleaning"...