By Contributing Reporter

RIO DE JANEIRO, BRAZIL - The state of Acre, at the westernmost tip of Brazil, is so remote that it is jokingly said to be non-existent. However, for geochemist Foster Brown, Acre is the center of the universe, a place that could help save the world.

"This is an example of hope," he says, while outside behind his office at the Federal University of Acre, where the Amazon

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