I'm not an expert but I can't think of much we produce here in ca.,we do grow a lot an from what I see its mostly sent/sold to other countrys/states.We shop at diff.grocery stores an most of the produce we see/buy is from mexico,hell even the cat food we get friskies,9 lives,etc.is from china or S.E asia,most dog food also,it may be distributed from some warehouse in the USA but its not made there..Calif.produces little oil,most is brought in,most lumber is imported,as is our power!!!Water is getting very rare but we do have a lotta green lawns an grow lots of lettuce in the desert..Also ya gotta think of the rest of the country an elsewhere,stuff gets nasty an in short supply,real or perceived other states will buy/take what we have along with the feds an we will do the same to them,stuff will go to the highest bidder,regardless who it is....An now with covid our whole economy is upside down except for the stock market....An no I don't worry much about it but it is our reality like it or not..It does pay to be a prepper in many ways,lol...I read the article a couple weeks ago then kinda forgot about it. We produce a lot of goods in CA. Are there specific things we can't get locally that must be imported? I know most of our electronics, clothing, etc... come from China because of cheap labor. But if shipping costs skyrocket 10-20X I would think US labor and local shipping would soon become the cheaper alternative.