Anonymous gifts are common. But a climate group says the $10 million donation is a big mystery

On a Friday morning in April, Dan Stein, the founder of Giving Green, a climate philanthropy organization, found big news in a surprising email. An anonymous donor had given his fund $10 million. “I haven’t quite processed the number of zeros,” Stein said, adding that he was “excited, awestruck and surprised” by the gift. Giving … Read more