The Joe Biden administration wants Americans to fight global warming by speeding up the transition to electric vehicles, and that means we need more charging stations. Right now, there are around 100,000 chargers nationwide, and the White House says we need at least half a million. A lot of money is going into building them. The infrastructure law, signed just last month, is sending $5 billion to states to build out the charging network. But what will all this investment look like? Marketplace’s Kimberly Adams speaks with Sam Houston, a senior vehicles analyst for the clean transportation program at the Union of Concerned Scientists.