'Almost no one is safe from air pollution.'
Conversely, it found that only 0.001 percent of the global population live in areas with levels of PM 2.5 below the safe threshold recommended by the World Health Organization , which accounts for less than 0.18 percent of available land on the planet.
"Almost no one is safe from air pollution," study lead author Yuming Guo, a professor at the Monash University School of Public Health and Preventive Medicine,. "The surprising result is that almost all parts of the world have annual average PM 2.5 concentrations higher than air quality guidelines recommended by the World Health Organization."
PM 2.5 is a fine air particulate that's no more than 2.5 microns in width — over thirty times smaller than a grain of sand — allowing it to easily invade our lungs and bloodstream. Lung cancer is an obvious fear, but PM 2.5's potential to cause and exacerbate heart disease should not be overlooked, either.by the US Environmental Protection Agency , exposure to PM 2.5 as brief as a few hours can be enough to trigger "cardiovascular disease-related heart attacks and death.
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