When it comes to energy and the environment, most of us feel conflicted. On the one hand, we depend on affordable energy for almost everything—from traveling across town or across the world, to cooking our food, to running Google searches and talking to friends on cell phones. On the other hand, we’re concerned about using too much energy, depriving others of the same luxury and degrading our natural environment in the process. Our prosperity, we’re often told, is unsustainable. The good news is that our worries are based more on misperceptions than reality. Affordable, abundant energy is within our reach—if we pursue the right policies. And we don’t have to destroy the environment to get it.