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Ozone pollution may be as harmful to your lungs as smoking cigarettes, study finds.

August 29, 2019

Emphysema is considered a smoker’s disease. But it turns out, exposure to air pollution may lead to the same changes in the lung that give rise to emphysema or chronic obstructive pulmonary disorder (COPD) according to an August 13, 2019 report from NPR.

A new study published August 13th in The Journal of the American Medical Association (JAMA) finds that long-term exposure to slightly Lower ozone NAAQS begins to have an air of inevitabilityelevated levels of air pollution can be linked to accelerated development of lung damage, even among people who have never smoked. The study looked at the health effects of breathing in various pollutants, including ground-level ozone, the main component of smog.

The researchers found that people in the study who were exposed for years to higher-than-average concentrations of ground-level ozone developed changes to their lungs similar to those seen in smokers.

“We found that an increase of about three parts per billion [of ground-level ozone] outside your home was equivalent to smoking a pack of cigarettes a day for 29 years,” says one study author, Joel Kaufman, a physician and epidemiologist at the University of Washington.

The study involved nearly 7,000 adults living in six U.S. cities: Chicago, Los Angeles, Baltimore, St. Paul, Minn., New York City and Winston-Salem, N.C. Generally, people in the study were exposed to annual average concentrations of between 10 and 25 parts per billion of ground-level ozone outside their homes.

But there’s no reason to believe that the pockets of elevated ozone exposure are limited to those cities. Kaufman says people in communities all over the U.S. can be exposed to similar concentrations — which can vary from day to day, season to season and year to year. Typically, ground level ozone — or smog — forms when pollution that’s released from cars’ tailpipes and from smokestacks bakes in the sunlight. (The EPA has this simple explainer.) Ozone is typically highest on hot, sunny days.

“It was a very large surprise to us to see that the effects were in the same magnitude as cigarette smoking, which is the best-established and most-recognized cause of emphysema,” Kaufman says.

Chronic respiratory disease (which includes chronic obstructive pulmonary disease – COPD – and emphysema) is a leading cause of death in the U.S. The World Health Organization estimates that each year 7 million premature deaths around the world are linked to air pollution. These new findings help to answer a very important question about COPD, Brigham says.

“We know … that a significant proportion of the U.S. population who has COPD actually, are never smokers,” Brigham says. So, what’s causing their lung disease? “I think this [study] gives us a partial answer.”

Overall, most types of air pollution have been declining in the U.S. — in part, thanks to the policies put in place by the Clean Air Act. But ground level ozone — or smog — has been harder to control. One explanation is that with increasing numbers of hot days, the conditions are more favorable to the formation of ozone.

In the past, the larger concern about ozone was the short-term exacerbation of symptoms during smog-alert days for people living with chronic lung disease such as asthma or COPD. The effects of long-term, chronic exposures were not well understood.

“In the past, the EPA has not accepted that COPD is caused by long-term, chronic air pollution,” says George Thurston, a professor of environmental medicine at NYU Langone Health.

But, now, this study adds to the evidence that the benefits of cleaning the air are even larger than previously calculated because the findings suggest that long-term exposure to air pollution is damaging to lung health.

Thurston says if these long-term cumulative effects were to be included in policymakers’ cost-benefit calculations, “the benefits will even more so outweigh the cost of moving forward on cleaning the air.”

What this means to you
A new study published in The Journal of the American Medical Association (JAMA) finds that long-term exposure to slightly elevated levels of ground level ozone developed changes to the lungs similar to those seen in smokers. An increase of about three parts per billion of ozone outside the home was equivalent to smoking a pack of cigarettes a day for 29 years.

MIRATECH can help
Contact MIRATECH for stationary engine NOx, CO and VOC emissions solutions.