If you are concerned about microplastics, the world starts to look like a minefield. The tiny particles can slough off of polyester clothing and swirl around in the air inside your home; they can scrape off of food packaging into your take-out food.
But as scientists zero in on the sources of microplastics — and how they get into human bodies — one factor stands out.
Microplastics, studies increasingly show, are released from exposure to heat.
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