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The first EV with a lithium-free sodium battery hits the road in January
(www.engadget.com)
This is a most excellent place for technology news and articles.
It was a light bulb moment to me when I realised toxicity is at least somewhat correlated with abundance.
Like lots of metals can be toxic but something like iron is so common you could just throw it on the ground and while certainly not ideal it's far from a major problem. The environment is very good at dealing with iron.