For some time I’ve been noticing news reports about PFAs [1]. I hadn’t thought much about that issue, I grew up when leaded petrol was standard, when almost all thermometers had mercury, when all small batteries had mercury, and I had generally considered that I had already had so many nasty chemicals in my body that as long as I don’t eat bottom feeding seafood often I didn’t have much to worry about. I already had a higher risk of a large number of medical issues than I’d like due to decisions made before I was born and there’s not much to do about it given that there are regulations restricting the emissions of lead, mercury etc.
I just watched a Veritasium video about Teflon and the PFA poisoning related to it’s production [2]. This made me realise that it’s more of a problem than I realised and it’s a problem that’s getting worse. PFA levels in the parts-per-trillion range in the environment can cause parts-per-billion in the body which increases the risks of several cancers and causes other health problems. Fortunately there is some work being done on water filtering, you can get filters for a home level now and they are working on filters that can work at a sufficient scale for a city water plant.
There is a map showing PFAs in the environment in Australia which shows some sites with concerning levels that are near residential areas [3]. One of the major causes for that in Australia is fire retardant foam – Australia has never had much if any Teflon manufacturing AFAIK.
Also they noted that donating blood regularly can decrease levels of PFAs in the bloodstream. So presumably people who have medical conditions that require receiving donated blood regularly will have really high levels.
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