Can you visualize clean air? Is it possible to see how polluted your air is, compared with other towns around the world? Now, thanks to a new tool created by the New York Times, you can.

As the Times’ article points out, small particulate air pollution (soot) was responsible for 4.2 million deaths worldwide in one recent year alone, as well as millions more sickened. Any tool that helps us better illustrate the value of reducing that pollution is a boon for public health.