An electric-car battery can weigh thousands of pounds. As more electric cars hit the road, the race is on to find a sustainable way to deal with these batteries once they die. One startup uses a high-tech shredding system to recycle battery waste. But it can’t recover all the valuable metals from it just yet.

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CORRECTION: An earlier version of this video incorrectly stated that lithium and cobalt cost more than gold. Also, at 3:11, this video incorrectly identifies Tim Johnston as the CEO & Cofounder of Li-Cycle. He is the company’s Executive Chairman & Cofounder. We apologize for the errors.