Wayne,
You hit one of the problems right square on. Every year they pave over more and more farming land to build houses for more and more people who want to have food. When I moved to this area we had huge fields of strawberries and all kinds of farming. Now I would guess that at least 60% of those fields are gone and have housing developments on them. The last good agriculture land up here in on the Churn Creek bottom and last year they had a huge fight as the city of Redding was going to use that stupid Eminent Domain and take most of it for some rich developer to put in houses and a huge auto mall. So far the people who own the land and live there have managed to stop it, but the city will take it just to show their power. They still want to build and there are empty houses everywhere and more coming as they do the foreclosures on them.
Ron