If you search for your city on a new map and zoom in, you can see pollution drifting from factories, power plants, and ports into your neighborhood. The map—a first-of-its-kind air quality tool from Climate TRACE, a nonprofit coalition cofounded by former Vice President Al Gore—shows how pollution moves through cities.

The new interactive tool, launching September 24, is powered by a sophisticated model that tracks local air pollution and weather data and feeds the map. It shows PM 2.5 pollution (responsible for nearly 9 million deaths each year globally) in more than 2,500 cities.

Orange dots indicate sources of pollution, with a stream of smaller dots showing how it moves over the city, shifting course with the wind. Right now, the map presents snapshots of average and bad air days in

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