Biblography
- http://science.howstuffworks.com/fuel-cell.htm
- http://auto.howstuffworks.com/hybrid-car.htm
- http://auto.howstuffworks.com/electric-car.htm
- http://auto.howstuffworks.com/catalytic-converter.htm
- http://www.nrdc.org/globalWarming/f101.asp
- http://www.nrdc.org/globalWarming/fcons.asp
- http://www.net.org/warming/causing.vtml
- http://library.thinkquest.org/J003411/causes.htm
- http://en.wikipedia.org/wiki/Solar_energy
- http://www.beaconpower.com/SolarPower/
HowSolarPowerWorks.htm
- http://ga.water.usgs.gov/edu/hyhowworks.html
- http://www.wvic.com/hydro-works.htm
- http://www.wvic.com/how-gen-works.htm
- http://en.wikipedia.org/wiki/Wind_turbine
- http://www.windpower.org/en/kids/intro/build.htm
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