I always wondered about the link between greenhouse gas and global warming. I mean, if there's such a thing as an ice age, and the last ice age was, like, 50,000 years ago, then isn't it plausible to say the earth has been warming since then? During the last few million years, there have been many glacial periods, occurring initially at 40,000-year frequency but more recently at 100,000-year frequencies. How can anyone blame cars for something that's been going on since Earth's birth? But yeah, I still would like to do away with fossil fuel. It's such a nasty pollutant: ever look at the road when it's raining and see all those rainbows? And if you ever get that stuff splashed onto you, which I have, your clothes get ruined, you can't wash the tar off your skin, and you smell like gas for days. Feel sorry for the birds and other animals going down for a sip: it gets on their feet, then they're screwed... I guess I can blame people with leaking gaskets for that.