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A national network of high speed trains can be powered by a combination of renewable energy sources including wind, solar, geothermal, and ocean/tidal energy.America's dependency on oil is the most severe in the world, and inevitably pulls us into costly resource wars.
1 Electrical Energy is when electricity creates motion, light or heat. 2  An example of electrical energy is the electric coils on your stove. 3  Gravitational Energy is motion that is caused by gravity. 4  An example of gravitational energy is water flowing down a waterfall. Electrical Energy is when electricity creates motion, light or heat. 2  An example of electrical energy is the electric coils on your stove. 3  Gravitational Energy is motion that is caused by gravity. 4  An example of gravitational energy is water flowing down a waterfall.