South Sudan’s longest cholera outbreak enters critical stage

Tom Steyer is on a mission. It began in 2006, when the San Francisco hedge-fund manager flew his family to Alaska to show them a glaciated valley he’d fallen in love with 25 years earlier. But summers had changed in Alaska. There was no ice on the mountains, no snow in the valley.On that day, Steyer changed, too. The company he’d founded, Farallon Capital, had long invested in fossil fuels. But St