Mind you, this would be in a state that's not even close to completing a high speed rail line between Los Angeles and San Francisco.
The existing hybrid gas/renewable electric grid California enjoys today is better than coal and can be extended to cover transportation and household furnaces, water heaters, and other appliances... but that's not going to save the world or even bring down California's per capita carbon footprint to the world average.
The only existing technology capable of displacing fossil fuels entirely is nuclear power.
Is California ready for that?
I think people are beginning to realize that if Diablo Canyon is shut down most of the load will be picked up by gas plants, especially as the severe drought in the West continues. The drought has already reduced the capacity of California's major water projects to stabilize the electric grid, pumping water uphill when renewable energy is plentiful, generating power by letting water down hill when it's not.
And maybe Californians might also realize that covering the desert with solar panels, and hillsides and oceans with wind turbines, is an environmentally destructive thing to do.
"We had to destroy the environment in order to save it!" is not an ethical perspective.