GM is making cars that energy efficient. The only way to justify them is when gas is at $4. It's a lot higher than that in most of Europe.

Republican way to combat pollution and global warming ... put head in sand and pretend it isn't happening until it's way too late.

Basically this is just capturing some of the costs of polluting. It's capitalizing something that has always been free. We don't live in a world of infinite resources.