Study: Air pollution shortens your life
Air pollution is shaving months — and in some cases more than a year — off your life expectancy, depending on where you live, according to a study published Wednesday.
Worldwide, outdoor air pollution reduces the average life expectancy at birth by one year.
The effect is much more pronounced in some countries: It cuts the average Egyptian’s life span by 1.9 years and the average Indian’s by 1.5 years. In Russia, it’s around nine months.
For the United States, it’s less, currently reducing the life expectancy of an American born today by a little more than four months on average.
The study, in the journal Environmental Science & Technology Letters, took into account measurements of outdoor, or ambient, air pollution.
It gathered data from previous studies that used satellites and ground-based pollution meters to calculate levels of ambient fine particulate matter, known as PM 2.5.
That kind of pollutant can come from a variety of sources, including coal-fired power plants, truck tailpipes, wildfires and dust storms.
The researchers then calculated the impact of that pollution on the life span of a person born today.
Joshua Apte, an engineering professor at the University of Texas at Austin and the lead author of the study, called that kind of particulate matter “the single most important environmental pollutant for ill health and death.”
The sources of PM 2.5 pollution and greenhouse gas emissions are often “tightly linked,” Apte added.
Apte’s team found that exposure to indoor air pollution — for example, cooking with wood, charcoal or animal dung — can also be devastating.
In South Asia, for instance, it reduces life expectancy by an additional 1.2 years.
Indoor air pollution levels were calculated by taking a limited set of actual indoor air pollution data and extrapolating it based on what fuels people use in their kitchens in different countries.
The damaging impact of air pollution undercuts the overall progress that the world has made in raising life expectancy in the past decades.
Indoor and outdoor air pollution together are directly responsible for 1 in 9 deaths worldwide, according to estimates by the World Health Organization.