fundamental and personal stand—he stopped using all forms of motorized transportation. Soon after embarking on this quest that would span two decades and two continents, he took a vow of silence that endured for 17 years. It began as a silent environmental protest, but as a young African-American man, walking across the country in the early 1970s, his idea of "the environment" expanded beyond concern about pollution and loss of habitat to include how we humans treat each other and how we can better communicate and work together to benefit the earth.Through his silence and walking, he learned to listen, and along the way, earned college and graduate degrees in science and environmental studies. An amazing human-interest story with a vital message, Planetwalker is also an engaging coming-of-age pilgrimage.

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