Billionaire Tom Steyer, left and Gov. Jerry Brown speak at an event in Paris on Dec. 7, 2015.
Billionaire Tom Steyer, left and Gov. Jerry Brown speak at an event in Paris on Dec. 7, 2015. dsiders@sacbee.com The Sacramento Bee/David Siders
Billionaire Tom Steyer, left and Gov. Jerry Brown speak at an event in Paris on Dec. 7, 2015. dsiders@sacbee.com The Sacramento Bee/David Siders