On Monday, President Trump tweeted out a map and said "America: the Cleanest Air in the World - BY FAR!".
On Monday, President Trump tweeted out a map, exclaiming that American air is the best air by far.
This kind of particulate matter is only one component of air pollution.
In 2014, the EPA estimated that between 50,000 and 120,000 people in the US die prematurely because of bad air.
In terms of PM 2.5 pollution, the country with the world's cleanest air is New Zealand, while the US ranks seventh on the list.
Meanwhile, the cleanest cities in the world (in terms of particulate concentrations) are in Sweden.
If you're wondering how clean the air you're breathing right now is, check out the National Weather Service air quality forecast, or use the EPA's interactive air quality map. »