From Colombia to Argentina, major cities in Latin America are starting to adopt electric bus fleets. In a region with the highest use of buses per person globally, officials believe the transition will help meet climate targets, cut fuel costs, and improve air quality.

In Medellín, Colombia, passengers cram aboard a battery-powered bus during the morning commute. Inside, the vehicle is a respite from the crush of cars, taxis, and motorcycles winding through traffic outside. The driver, Robinson López Rivera, steers the bus up a steep ramp, revealing views of hillsides covered with rooftops of tile and tin. The bus dashboard indicates that the batteries are mostly charged, with enough power to last through the evening rush hour.

“It’s a little smoother and more comfortable to drive. And there’s hardly any noise,” López Rivera says from behind the wheel. He gently brakes as a street vendor pushes a fruit cart across the dedicated bus lane. At night, the bus will return to a parking lot by the airport, recharging its 360-kilowatt battery pack while the city sleeps.