I recycle and take public transportation...
I don't really see the point of "save our earth"
1/ in a couple of million years the sun will expand and absorb mercury, venus, earth and mars; eventually the sun explodes...
2/ Before the sun explodes, we will already have technologie for terraforming (creating oxygen, atmosphere on other planets)
3/ Aliens invade and we die anyway; maybe we should pollute the earth so they die of pollution
yes, i like national geographic