Politicians have blasted the notion of banning gas stoves after a federal regulator seemed open to it. It turns out, there are no plans to shut off the stoves for now — but there are significant concerns about their health risks.

Nearly 40 cities across the country are recruiting 4,000 young adults ages 25-35 to participate in a study that will track and analyze their lung health over their lifetime to better understand how environment, lifestyle and physical activity impact respiratory health.