Dick Swanson/Documerica
The Walt Whitman Bridge over The Delaware River, August 1973.
- On Monday, President Trump tweeted out a map and said "America: the Cleanest Air in the World - BY FAR!"
- But the map only shows us an estimate of how much very fine $4, which can come from gas emissions and exhaust, but also cooking fires, wood burning, and even dust storms.
- It's not a surprise that the US has less of these particles floating around than some developing countries with fewer environmental regulations and more open cookfires, but it doesn't mean the US has the cleanest air.
On Monday, President Trump tweeted out a map, exclaiming that American air is the best air by far. That's not exactly true.
The map, grabbed from a World Health Organization $4, is an estimate of how much ultra-fine particulate matter (PM) people are breathing in around the world. This kind of particulate matter is only one component of air pollution.
The map is tracking things like dust and other tiny particles floating around that are smaller than two and a half microns wide (what's sometimes referred to as "PM 2.5" pollution.) These super-fine particles are 30 times skinnier than a strand of human hair. Because they're so small, they can $4 - a serious problem for people who already have breathing and heart issues. Heavy exposure over time can lead to reduced lung function and $4.
Common sources of these pollutants include emissions from cars and other vehicles, as well as heating oil, coal, secondhand smoke, chemicals wafting from power plants, smoke from cooking, and even natural sources like forest fires. When the air is hazy, $4 effects on the brain.
Air pollution expert Gabriele Pfister, the deputy director at the National Center for Atmospheric Research (NCAR) Atmospheric Chemistry Observations and Modeling Lab, told Business Insider that using the map to point out how crystal-clean US air may be is misleading, at best.
"America doesn't have the cleanest air in the world just because it's white on this map," she said, adding that it's no surprise that we have fewer PM 2.5 pollutants than some developing countries where people still cook over open flames and burn down forests for fuel.
According to the US Environmental Protection Agency (EPA), aggregate emissions of six of the most common air pollutants have dropped 73% since 1970, when the agency$4 about cleaning up the air.
But the work isn't done. In 2014, the EPA estimated that between $4 in the US die prematurely because of bad air. The agency also $4 that "despite great progress in air quality improvement, approximately 111 million people nationwide lived in counties with pollution levels above the primary U.S. National Ambient Air Quality Standards in 2017."
Check out this EPA map of counties that don't meet the Clean Air Act standards:
"PM 2.5 is one component of air pollution," Pfister said. "If you look at ozone pollution, you will actually see that the US has quite a bit more ozone pollution than many regions in the developing world... that has to do with the ozone chemistry."
She worries about the air she breathes in Colorado, as $4 near schools, hospitals, and people's homes, hospitals.
"Specifically in the western US, we have leveled off. We are not clean," she said.
In terms of PM 2.5 pollution, the country with the world's cleanest air $4, while the US ranks seventh on the list. Meanwhile, the cleanest cities in the world (in terms of particulate concentrations) are in $4
While breathing air in Stockholm is better for your health than inhaling in $4, it's false to think that a single country could ever have the "cleanest" air, because we all live under the same sky, Pfister said.
If you're wondering how clean the air you're breathing right now is, check out the $4, or use the $4 map.