London’s Ultra Low Emission Zone cleaned up the city’s air. Then children’s lungs got bigger

In London, an Ultra Low Emission Zone requires vehicles to meet strict emissions standards or else pay a daily fee for driving through that area. It’s an initiative that has reduced toxic air pollution levels and spurred drivers to adopt cleaner vehicles. And now it’s even been linked to improved lung growth in the city’s children. Before the Ultra Low Emission Zone (ULEZ), London children had stunted lung growth, a 2018 study found. When exposed to air pollution, like...