PHY 121 Lecture Notes - Lecture 29: Pumped-Storage Hydroelectricity, Uranium-238, Algae Fuel
11 Dec 2016
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Document Summary
Methane is an example of a bio gas. We can"t switch back to wood for energy because we just simply don"t have enough wood to sustain humanity. The alcohol we burn comes from some form of ethanol which comes from the crops we grow. There is an ethical dilemma to using ethanol because we reduce our food supply by using ethanol as a fuel source. Produce approximately 140 times more fuel per unit area than corn. Not using a food source (or productive farmland). An idea for the future of algae fuel is incorporating it with urban planning. Geothermal energy is the energy of earth extracted by injecting water into the hot underground. Hydrogen fusion uses the energy release when atoms of hydrogen fuse (similar with the reactions releasing energy in the stars). Other sources include coal gasification and liquefaction, hydrogen and tidal waves.
