Bike walk carpool take bus or train buy energy

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Unformatted text preview: space Works only during the day (however some solar technologies such as solar concentra4on can store converted heat energy for up to 7.5 hours to con4nue electricity genera4on through the night) Inadequate in cloudy climates - major problem as an energy source is its intermiTent nature Inadequate in many colder climates as sole hea4ng source (need conven4onal back- up) Current photovoltaic technology is very expensive, uses non- renewable and rare resources, and has toxic by products during produc4on Hydroelectric Power 2.5% of world’s commercial energy (2.7% U.S.) River water is held behind a dam Falling water is used to spin the...
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This note was uploaded on 01/30/2014 for the course IB 105 taught by Professor Caceres during the Fall '08 term at University of Illinois, Urbana Champaign.

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