All this talk about rocks and what little damage they can do, um, David used a rock to bring down Goliath. It isn't about the size of the rock, it's about where it hits you and yes you can kill someone with one.
I mean , go to some countries and thats how they KILL people
http://en.wikipedia.org/wiki/Stoning
You just don't throw rocks at people with guns
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Carbon is not the problem, it makes up 0.041% of our atmosphere , 95% of that is from Volcanos and decomposing plants and stuff. So people in the US are responsible for 13% of the carbon in the atmosphere which 95% is not from Humans, like cars and trucks and stuff and they want to spend trillions to fix it while Solar Panel plants are powered by coal plants
think about that