9 in 10 people are living among dangerous levels of air pollution

Mother Earth isn't the only one suffering from rising levels of air pollution. A new report by the World Health Organization out Tuesday revealed that in 2014, 92 percent of the world's population was living with levels of air pollution that exceeded what WHO considers to be safe.

In particular, WHO is concerned about higher concentrations of pollution particles that are smaller than 2.5 micrometers, as these particles are tiny enough to "be inhaled, travel into the lungs, and enter the bloodstream," The Washington Post reported. "People think of air pollution as a respiratory disease," said Carlos Dora, head of WHO's air pollution team. "And in fact, it's heart disease, strokes and cardiovascular. Because there's very small particles that go into the blood. ... The damage air pollution does to the vessels is similar to the damage that cholesterol or high blood pressure do."

In 2012, an estimated 7.3 million people died from air pollution, produced both inside the home and outdoors. The problem is particularly acute in "low- and middle-income countries," which WHO reported accounted for 88 percent of the 3 million premature deaths caused by outdoor air pollution in 2012.

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Still, wealthier countries certainly aren't in the clear. In Europe, cities including Paris and London failed to meet air quality standards, and in America, both Los Angeles and Manhattan fell short.