In this Oct. 7, 2015, file photo, billionaire environmentalist Tom Steyer discusses climate change at a symposium in Sacramento, Calif.
In this Oct. 7, 2015, file photo, billionaire environmentalist Tom Steyer discusses climate change at a symposium in Sacramento, Calif. Rich Pedroncelli AP
In this Oct. 7, 2015, file photo, billionaire environmentalist Tom Steyer discusses climate change at a symposium in Sacramento, Calif. Rich Pedroncelli AP