Gavin Newsom and John Cox both drive zero-emission Teslas. That’s about where the common ground ends between California’s candidates for governor when it comes to the environment. … Cox opposes as a “boondoggle” [Gov. Jerry] Brown’s $17 billion proposal to move water from Northern California to Southern California through twin tunnels in the Sacramento-San Joaquin River Delta. … Newsom backs a one-tunnel option as more cost-effective.