Are you kidding? Every kind imaginable, from subsidies for coal mining and oil to subsidies on natural gas, subsidies on upgrading for higher efficiency, etc.

Are you kidding? Every kind imaginable, from subsidies for coal mining and oil to subsidies on natural gas, subsidies on upgrading for higher efficiency, etc. Not to mention the implicit subsidy of the rest of us picking up the tab for the damage they are doing to the environment. If you're really curious there's tons of information out there.