A new study by an international team of scientists has found that outdoor air pollution kills 2.5 million people worldwide each year. According to BBC News, the researchers calculated the vast majority of the deaths, 2.1 million, were linked with fine particulate matter, with some 470,000 deaths from ozone. In addition to contributing to these deaths, outdoor air pollution increased “respiratory and heart disease risks, with the young, elderly and infirm most vulnerable.” Other research has shown that indoor pollution, particularly in developing countries, causes another 2 million deaths annually.
The researchers wrote: “Epidemiological studies have shown that PM2.5 (particulates with a diameter of less than 2.5 microns – about 30 times thinner than the width of a human hair) and ozone have significant influences on human health, including premature mortality.”
According to the U.S. Environmental Protection Agency (EPA), particulate matter is a “complex mixture of extremely…
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