It's one thing to use toxic materials in water pipes, fuel or painting your walls with it. It's completely different thing to use them in devices that are encl

It's one thing to use toxic materials in water pipes, fuel or painting your walls with it. It's completely different thing to use them in devices that are enclosed and that you never interact with directly, like motors, batteries, electronic components or wires. And in fact we're using lead in car batteries and it's not a problem. BTW most heavy metals are toxic, including copper. It's just less readily absorbed and accumulated in our bodies.