My aunt is the only part of our immediate family who lived in California for long, but my mother also worries about her other sister - living in coastal Oregon - who shows signs of Parkinson's - though she only kept a small household garden and a couple of old apple trees. We tend to feel that these tremors are related to Monsanto products that are so hard to avoid.
I have lived in many other places since living in Oregon. My personal poisoning came from six years of weekly allergy shots.