The Subway Is Sweltering. Is There a Way to Put That Heat to Good Use?

Mayor Zohran Mamdani and state transit officials announced a plan to study a heat-capture system that could cool a notoriously hot train station and help heat city buildings in the winter.Mayor Zohran Mamdani, right, and Janno Lieber, the chief executive of the Metropolitan Transportation Authority, announced a feasibility study for a system to help cool subway stations.