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http://www.wellhome.com/blog/the-pros-and-cons-of-hydropower/
http://ga.water.usgs.gov/edu/wuhy.html
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http://www.energy4me.org/energy-facts/energy-sources/hydropower/4/
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http://www.hydrofoundation.org/index.html
http://cga.ct.gov/2010/rpt/2010-R-0401.htm
http://spectrum.ieee.org/energy/renewables/future-of-hydropower
http://www.wellhome.com/blog/the-pros-and-cons-of-hydropower/
http://ga.water.usgs.gov/edu/wuhy.html
http://www.energy4me.org/energy-facts/energy-sources/hydropower/3/
http://www.energy4me.org/energy-facts/energy-sources/hydropower/4/
http://www.epa.gov/cleanenergy/energy-and-you/affect/hydro.html
http://exergy.se/goran/cng/alten/proj/97/h/index.html#climatechanges
http://adventure.howstuffworks.com/outdoor-activities/fishing/fish-conservation/fish-populations/fish-ladder.htm
http://www.ehow.com/list_6454679_hydroelectric-dams-made-out-of_.html
http://www.ehow.com/info_8245657_parts-hydroelectric-power-plant.html
http://www.hydrofoundation.org/index.html