Climate change. Yup. Cutting down on your energy use is the fastest way to cut your carbon footprint. If you aren't cutting back on energy, you aren't really doing much.
Energy security. Mike Huckabee put it this way:
None of us would write a check to Osama bin Laden, slip it in a Hallmark card and send it off to him. But that's what we're doing every time we pull into a gas station. We're paying for both sides in the war on terror - our side with our tax dollars, the terrorists' side with our gas dollars.It makes sense to be mindful of where our money is going. It makes sense to make our country more energy independent.
To save money. You can't spend the same money twice. You can't spend the same tax dollars twice, either, so we should be demanding energy efficiency in government buildings, as well.
Save some for the kids. Crude oil and natural gas are not just energy sources. They are also the raw materials for plastics and nitrogen fertilizer, and a lot of other stuff I don't know about or that hasn't been invented yet. You might need a new heart valve someday. Wouldn't it be ironic if the doctor told you, "Sorry. We used that oil back in '08 to fuel a few Hummers....."