Again, I'd prefer that we limit the activists list to activist work, not general discussion, but in short, if I give a dollar to TNC's PlantABillion program, they plant a tree. If I give them $10, they plant 10 trees. Find me a more libertarian organization that does that, and I'll happily support them. Until then, I'm supporting TNC. I'm not one of those Libertarians who lets the perfect be the enemy of the good.