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21 YoYo Powered iPhone Charger? Hank Green 17847
22 Self-Powered Light Switch Has No Wires Hank Green 40096
23 2 Million New Jobs by 2010 with Green Investment Jaymi Heimbuch 17617
24 Green Competition is a Good Thing Jaymi Heimbuch 15723
25 Cool Revolving Door Concept for Powering Up Jaymi Heimbuch 16244
26 Terasen Trying to Power Homes with Human Poo Peg Fong 18802
27 Capturing the Power of Trillions of Footfalls Raegan Payne 64145
28 Strap-on Kinetic Charger Dances Away Dead Batteries Jaymi Heimbuch 27935
29 Running America on Liposuctioned Fat Hank Green 16579
30 Spinnaker’s Steps May Generate Power from Your Footfall Jaymi Heimbuch 17951
31 Old-Fashioned Hand Crank Powers New-Fangled Gadgets Jaymi Heimbuch 23484
32 Bike Trees Save Space and Keep Bikes Safe Hank Green 17806
33 Cheap Electric Bike Saves Cash...But at What Cost Peg Fong 29661
34 Electro-SeeSaw Harnesses World's Most Energetic Thing Zach Yakush and Hank Green 23263
35 Solar Bicycle Boat Built for Four Hank Green 22406
36 50 Miles Per Burrito: Is the Body the Most Efficient Vehicle? Hank Green 47113
37 Carectomy Week in Review Joshua Liberles 18210
38 Carectomy Week in Review Joshua Liberles 17176
39 Gravia Floor Lamp: Human Powered, Never Burns Out Hank Green 23793
40 Revolution Door Captures Human Power Hank Green 21858
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