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10 intriguing environmentalists

By: Sidney Stevens on Oct. 16, 2009, 11:23 p.m.
John Francis

Photo: Art Rogers/Pt. Reyes

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John Francis

After witnessing the devastation of a 1971 San Francisco oil spill, Francis gave up motorized transportation and chose to stay silent. But it wasn’t the silence of apathy. It was a roaring silence that’s still being heard. His marathon wordless walk (recounted in his book Planetwalker: 22 Years of Walking. 17 Years of Silence) helped him reconnect with nature and inspired his earth-stewardship group Planetwalk.