“Rain causes autism?”
...”Perhaps infants and toddlers are kept are kept indoors in front of the TV more in rainy climates, and that somehow causes brain changes, they said. Or perhaps they breathe in more harmful chemicals while indoors.
Vitamin D deficiency caused by insufficient time in the sun might also be a trigger, they said.
“Finally, there is also the possibility that precipitation itself is more directly involved,” they wrote. Perhaps a chemical or chemicals in the upper atmosphere are transported to the surface through rain or snow.....”