As you’ve probably noticed, your regular host Molly Wood is off the show. She has been creating a new Marketplace podcast called “How We Survive” about tech solutions to the climate crisis. This season is all about batteries. They’re key to getting us off fossil fuels. But most batteries in the world right now need lithium, a metal that’s only obtainable through mining. Marketplace’s Marielle Segarra speaks with Molly Wood about her visit to a lithium mining lab.