http://www.howstuffworks.com/framed.htm?parent=question658.htm&url=http://www.ent.ohiou.edu/~et181/hpv/hpv.html
http://science.howstuffworks.com/question658.htm
1hp = 746watt
http://www.windstreampower.com/Human_Power_Generator.php
...
CategoryEcoFriendly