In the area where I used to live, it was the fallout of cooking 200 years of fish. A little-known side benefit of living next to a fish factory. Greatest tomatoes in the world. The fish factory processed mossbunker. Menhaden, for you faggots. 3 times a week for 200 years, the local plant would process fish. They made fertilizer and cat food. There were 350,000 stray cats that used to live outside the chain link fence. I used to feed the strays until one of them ripped a ham sandwich out of my hand and instantly sliced my finger to the bone with its razor sharp claws. While my blood was spurting, I instantly turned on them. You should have seen 350,000 cats scattering in all directions once they got my ire.