Paul MacCready was an original EcoGeek. He created the first human-powered airplane, and sprearheaded the first human-powered flight across the English Channel. The story of his work on ultra-efficient flight and his interest in the environment are very inspiring.
His recent death has prompted the people at TED to release a talk he gave at their conference in 2003. If you've got a spare 20 minutes, there's no better way to spend them.
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