While energy efficiency has often occupied a low-profile in the nation’s climate debate, Obama gave it plenty of air time on Tuesday night.

“I’m also issuing a new goal for America: let’s cut in half the energy wasted by our homes and businesses over the next twenty years,” he declared. “We'll work with the states to do it. Those states with the best ideas to create jobs and lower energy bills by constructing more efficient buildings will receive federal support to help make it happen.”