Clad in a simple sweater and sneakers, surrounded by tech in his office in San Francisco, Topher White looks like an archetypal Silicon Valley start-up whizz.
There, though, the similarities end. For while his peers are making billions harvesting data, White’s aims are very much more altruistic. He is on a mission to save our rainforests – and he's doing it by harnessing our most everyday tech.
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