Tom Steyer, the former hedge fund executive, billionaire, and Democratic presidential candidate has become one of the leading activist investors on climate change. But he wasn't always as concerned.
For 26 years, Steyer ran the hedge fund he founded in 1986, Farallon Capital. It invested in all sectors of the economy — including fossil fuel companies.
But a return trip to Alaska in 2004 changed his internal compass, he told CNBC.
«When I was 24, I spent a summer working in Alaska,» Steyer told
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