There are two macro population health trends that suggest we are somehow poisoning ourselves at a large scale. Most people do not relate the two, but I personally wouldn't be surprised if they have related causes.
The first is the Flynn effect, which was rising IQ levels decade over decade, which halted and then reserved for most Western nations around 1990s/2000s and is now declining: https://en.wikipedia.org/wiki/Flynn_effect
The first is the Flynn effect, which was rising IQ levels decade over decade, which halted and then reserved for most Western nations around 1990s/2000s and is now declining: https://en.wikipedia.org/wiki/Flynn_effect
The second is the dropping fertility/sperm counts/hormone issues/etc: https://en.wikipedia.org/wiki/Male_infertility_crisis
I think microplastics along with forever chemicals/PFAS are two of the likely culprits and are probably fairly easy to deal with.
I wonder what else could be contributing?