Well that's kind of the point, get the companies that pollute with impunity out of our communities. Things like oil fields and refineries take up so much acreage for the amount of people they employ, and many are still situated adjacent to homes.
Why? Neither oil nor agriculture are large sectors as other parts of the californian economy, both contribute like 7% combined to the state GDP (1,2). Oil can be bought from elsewhere, it doesn't need to be extracted from the middle of residential neighborhoods in LA county like its the 1890s still.
Sure, but it's not like fossil fuels are the only way to power transport, although they're certainly the easiest way at present thanks to all the existing plant & infrastructure.
I have no issue with domestic production, just when its done in places that inevitably lead to the children getting significantly elevated rates of disease due to proximity and poor land use decisions.