My interview subject already suspects that our conversation will revolve around Greta Thunberg. He throws his head back in exasperation. Ingmar Rentzhog, 40, comes from Östersund, northern Sweden. The youngest of seven children, Rentzhog grew up on his family’s small farm. He has always loved nature, he tells me. “But I wasn't an environmentalist. I was a computer geek,” who started programming at the age of eight.
The man who discovered Greta
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