Save what?

Has it occurred to anyone that instead of trying to "save" the planet, we should be trying to save ourselves from certain death instead. Seriously, the only thing that the earth has to worry about is not becoming dust after colliding with another astronomical body, we have to worry about conditions that support life as we know it. I was watching Stargate SG-1 the other day and there was a Gadmeer craft converting a planet from being carbon based to sulfur. Notwithstanding the possibility of this, the planet could have cared less whether the Enkarans or Gadmeer inhabit the place, heck the planet can't even care at all. It's the same here; our planet can withstand global-warming, ice ages and American politics. The real question is: "Can humans?" Like the earth said, "Save Your Sorry Arse."