[hammock]

>But just because our bodies bioaccumulate things doesn't mean they cause cancer

And just because we can't pinpoint a mechanism of action doesn't mean it doesn't cause cancer :) There have been a number of MoA's proposed for PFOA specifically. Here are a couple:

https://www.ncbi.nlm.nih.gov/pubmed/22120428

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2516576/

Not everything has been studied. And may things are difficult to study. The "little black dots" or fake dirt on fancy astroturf fields are made from recycled road tires, which are a cocktail of all kinds of bad chemicals. And when they get lodged in goalkeepers' skin over time, they enter the body and cause some pretty rare and bad blood cancers. Do I have a study I can point to that says how? No. But do you want your daughter diving on one of those turf fields? https://www.cnn.com/2017/01/27/health/artificial-turf-cancer...

[reitanqild]

> The "little black dots" or fake dirt on fancy astroturf fields are made from recycled road tires, which are a cocktail of all kinds of bad chemicals. And when they get lodged in goalkeepers' skin over time, they enter the body and cause some pretty rare and bad blood cancers.

If this is true it should soon show up in people who work with tires or live near highways as well?

[hammock]

Yes and it does. https://www.theguardian.com/environment/2016/sep/11/pollutin...

In addition to that story there is another story I cannot find at the moment, that referenced a vegetable farm in Mexico which was linked to some bad human effects. Turns out it was right next to the highway and the pollution from diesel trucks was making it into the food. They moved the farm farther from the roadside and the problem stopped.