TLDR: There's strong evidence that extremely common--basically ubiquitous--plastics disrupt the endocrine system. They've been lowering sperm counts in the developing world for decades, the trend seems to be accelerating, and in the near future male infertility will start to cause significant problems. Spermatologists and endocrinologists are mentioning the word "extinction," though not as a certainty or even an extremely likely thing. There are epigenetic effects at work here, so the damage accumulates over generations.
I do wonder if this could also be partially responsible for any number of other weird health issues. It notes that low sperm count in men is associated with all kinds of health problems. What if phthalates and BPA are behind some of the drop in crime (due to dropping testosterone)? What if trans turns out to be a purely modern phenomenon? Etc.
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