It's worse than that for the lib global warming fanboys. Not only does the climate change on it's own without human intervention, but the Earth is not static. It shrinks and grows, the crust moves about, the magnetic core spins changing the magnetic poles, the planet wobbles on it's axis, and the planet's movements are affected by solar winds, space debris and gravitational tugs. I bet all that has far more to do with weather than our automobiles. The global warming adherents simply don't take all that into account when panicking about weather.
I’m thinking the global cooling nut jobs of the 70s were closer to the truth than Al Gore.