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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.
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 | Energy Assessor Training http://www.rigmadenenergytraining.co.uk Rigmaden are a leading independent energy assessor training company offering qualifications for those wishing to become energy assessors, throughout the UK. Rigmaden is one of the most established ABBE accredited training providers in the energy sector. - (Read more) |
 | National Renewable Energy Laboratory http://www.nrel.gov/ Facility of the US Department of Energy (DOE) for renewable energy and energy efficiency research, development and deployment. - (Read more) |
 | ENERGY STAR http://www.energystar.gov/ ENERGY STAR is a government-backed program helping businesses and individuals protect the environment through superior energy efficiency. - (Read more) |
 | Department of Energy http://www.energy.gov/ The Department of Energ'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. - (Read more) |