The U.S. energy sector is undergoing a profound transformation. The United States is producing more oil and natural gas, is generating more electricity from renewables such as wind and solar, and is consuming less petroleum while holding electricity consumption constant. These developments have had substantial economic and energy security benefits, and they are helping to reduce carbon emissions in the energy sector and thereby tackle the challenge posed by climate change. This book discusses the all-of-the-above energy strategy as a path to sustainable economic growth; the reemergence of the U.S. as a global petroleum producer; the issues Congress faces with the energy policy; and provides an overview of unconventional oil and natural gas.