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Direct linkLitowitz, Len S. – Technology and Engineering Teacher, 2012
Photovoltaics is a term that refers to thin cells that have the ability to directly convert sunlight into electricity. This process occurs without the use of any moving parts, and the sunlight is free for the taking if it can be captured for useful purposes like heating water or air or producing electricity. As the cost of installing a…
Descriptors: Science Activities, Engineering, Energy, Sustainable Development
Childress, Vincent W. – Technology and Engineering Teacher, 2011
People around the world are concerned about affordable energy. It is needed to power the global economy. Petroleum-based transportation and coal-fired power plants are economic prime movers fueling the global economy, but coal and gasoline are also the leading sources of air pollution. Both of these sources produce greenhouse gases and toxins.…
Descriptors: Fuels, Global Approach, Pollution, Energy
