You can alter the chemistry of plastics so that you end up with microplastics in your food if you go above certain temps with most plastics.
If you think that’s going to save you look harder, or just go back to ceramics like sane people. Your vasty majority is likely coming from textiles and tires, in the water and air respectively.
I’ll assume it’s cool, but currently hugged to death for me. Just wanted to point out batteries are replaceable even if glued, fixed my GrapheneOS Pixel7 after it killed itself (spicy pillow) charging in heat in a warmer country. iFixit kit + video worked, then got a Chargie which lets you set a temperature above which it will not charge (33C for me, only charges at night in summer). Probably relevant in your case.