Human Powered
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61 Weight to Watts Hank Green 14175
62 Ktrak SnowBike Hank Green 14215
63 The Best of the Best: Folding Bikes Hank Green 174732
64 Pull-String Power Hank Green 14745
65 Pedal Powered Laptop Hank Green 13924
66 Pedestrian-Generated Power Philip Proefrock 15474
67 DIY Human-Powered Tic Tac Light Hank Green 14221
68 Gerbil Wheel Elevator Hank Green 12555
69 Portable Squeeze Charger Hank Green 12860
70 A wind-up flashlight from Freeplay 12757
71 Gore v. Clinton in 08? Dave Burdick 12943
72 When you move, it's electric Dave Burdick 12761
 
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