Ethanol fuel energy balance     BioFuel                                                           

                                                                                

Courtesy of Wikipedia, the free encyclopedia

Energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working" is a scalar physical quantity that is an attribute of objects and systems that is is subject to conservation law. In physics, energy is defined as the work of certain force. Various kinds of energy (gravitational, elastic, electric, magnetic, etc) are usually named after corresponding force.

Several different forms of energy exist to explain all known natural phenomena. These forms include (but are not limited to) kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy. Any form of energy can be transformed into another form, but the total energy always remains the same. This principle, the conservation of energy, was first postulated in the early 19th century, and applies to any isolated system. According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time.

Although the total energy of a system does not change with time, its value may depend on the frame of reference. For example, a seated passenger in a moving airplane has zero kinetic energy relative to the airplane, but non-zero kinetic energy relative to the Earth.

	The Department of Energy's  Overarching mission is to advance the national, economic, and energy security of the United States; to promote scientific and technological innovation in support of that mission; and to ensure the environmental cleanup of the national nuclear weapons complex. The Department's strategic goals to achieve the mission are designed to deliver results along five strategic themes:
				US DOE Energy Efficiency and Renewable Energy  Web site provides information on energy efficiency and renewable energy
				National Renewable Energy Laboratory  Learn about NREL's research and development of renewable fuels and electricity that advance national energy goals to change the way we power our homes, businesses, and cars.
	Renewable Energy Policy Project  REPP's goal is to accelerate the use of renewable energy by providing credible information, insightful policy analysis, and innovative strategies amid changing energy markets and mounting environmental needs by researching, publishing, and disseminating information, creating policy tools, and hosting highly active, on-line, renewable energy discussion groups.
				American wind energy association  The wind energy industry seeks a national 25% renewable electricity by 2025 standard. This policy would provide a long-term commitment to renewable energy in the U.S., giving businesses the certainty they need to invest in new wind energy manufacturing facilities, and to expand current ones - creating tens of thousands of new American jobs. This long-term policy would also put the U.S. on a path to achieving the significant carbon dioxide emission reductions desperately needed to protect the health of our planet.
	American Solar Energy Society (ASES) Established in 1954, leads national efforts to promote solar energy education, public outreach, and advocacy. ASES publishes the award-winning SOLAR TODAY magazine, organizes and presents the ASES National Solar Conference, and leads the ASES National Solar Tour – the largest solar energy event in the world, as well as other powerful programs.			The Nuclear Energy Institute (NEI) is the policy organization of the nuclear energy and technologies industry and participates in both the national and global policy-making process.
				Naturalgas is presented as an educational website covering a variety of topics related to the natural gas industry.
				The World Coal Institute (WCI)  Coal is a vital global energy source - not only does coal provide electricity, it is also an essential fuel for steel and cement production, and other industrial activities. Technologies are continuously being developed to increase the ways in which coal can be utilised, to improve the efficiency of coal, and to meet environmental challenges - including carbon capture and storage technology.
	Environmental Protection Agency          The mission of the Environmental Protection Agency is to protect human health and the environment. Since 1970, EPA has been working for a cleaner, healthier environment for the American people.