Energy content of biofuel Energy content of biofuel The Energy content of biofuel is a description of the potential energy contained in a given biofuel, measured per unit mass of that fuel, as specific energy, or per unit of volume of the fuel, as energy density. A biofuel is a fuel, produced from living organisms. Biofuels include bioethanol, an alcohol made by fermentation—often used as a gasoline additive, and biodiesel, which is usually used as a diesel additive. Specific energy is energy per unit mass, which is used to describe the energy content of a fuel, expressed in SI units as joule per kilogram
The Quest: Energy, Security, and the Remaking of the Modern World The Quest: Energy, Security, and the Remaking of the Modern World The Quest: Energy, Security, and the Remaking of the Modern World is an international bestselling book by energy expert Daniel Yergin. The book was initially published on September 20, 2011 through Penguin Press and is considered to be the follow-up to Yergin’s 1992 Pulitzer Prize winning history of oil, "", and describes the development of the current energy system and prospects for the future. Upon its release, the book received praise and criticism both for its breadth of subject as well as for its impartiality. It is often suggested