Watched a good keynote from the same scientist who has been studying male fertility for the past ~40yrs that found sperm counts to be rapidly lowering and her investigation seems to suggest it's microplastics, among other factors, that are also contributing to autism. Plastics, while revolutionary, seem to be polluting the world like crazy.
Discussion
There are certainly a number of factors involved. Agreed.
The best rule of thumb for health is to follow the way of the ancestors. Get sunshine, exercise, fresh air, clean water, quality meat, fruits, etc, and to avoid anything developed within the recent fiat era, especially post 1971, as much as possible.