The Guardian: I didn’t speak for 17 years

I stopped speaking on my 27th birthday in 1973, because I found myself arguing all the time. After witnessing an oil spill in San Francisco Bay in 1971, I gave up using motorised vehicles and started walking everywhere as a statement about pollution. I lived in a small village on the west coast of America, where I kept getting into debates about whether one person could make a difference. I would rant and rave about how everyone should do what I was doing.

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