One important thing California has forgotten or chose to ignore.... vastly increasing population. No matter what California does, about green energy, it is merely a drop in the bucket of a WORLD-WIDE population increase. The greater the population , the greater the green-house gasses. For those who never thought about it, green-house gasses DO NOT stay in place. Those gasses "float" all around the world, Thus, exploding populations of Asia, continue to add evermore greenhouse gasses. So, no matter what CA does, the world will continue to use fossil fuels, and in the process, create more and more greenhouse gasses.
For those who have traveled to Asia, they may recall the heavy smog in mega-cities like Beijing, Manila, and the cities of India. Those places are filled with old cars, trucks, jeepney's etc which literally pour vast amounts of blackish/grey smoke.