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Solder is absolutely a problem. The life cycle of your part doesn't just include when you solder it. It includes anyone who has to handle it in the future, and it includes the E-Waste dump in an impoverished country that it inevitably ends up in.



Not really, metallic lead is pretty inert. Its lead compounds and lead dust that are dangerous.


recycled PCBs are often turned into dust.


Not just due to the Pb dust though, also Al, Fe, Cu, fiberglass:

"Mineralogical analysis of dust collected from typical recycling line of waste printed circuit boards" https://www.sciencedirect.com/science/article/abs/pii/S09560...


Yes and Cu and fiberglass and the resins are especially toxic too




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