All Local. All Morning in Everett
Seahawks training camp 2018: Exclusive coverage only on Q13 FOX

Study: Air pollution causes over 2 million deaths a year

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.
air pollutionBy Monte Morin, Los Angeles Times
Global air pollution contributes to the premature deaths of more than 2 million adults each year, according to new research.

In a study published Friday in the journal Environmental Research Letters, scientists used a number of mathematical models to estimate the effects of fine particulate matter — tiny particles, or soot, that penetrate deep into the lungs — and ozone, the main component of smog.

The estimate is smaller than most previous calculations, which pegged pollution-related deaths at more than 3 million a year. The researchers also concluded that climate change has had only minimal effect on pollution-related deaths.

“Our estimates make outdoor air pollution among the most important environmental risk factors for health,”  read a statement from lead study coauthor Jason West, an assistant professor of environmental science at the University of North Carolina. “Many of these deaths are estimated to occur in East Asia and South Asia, where population is high and air pollution is severe.”

West and his colleagues concluded that about 470,000 people die each year from ozone produced by human industrial activities. (Unlike ozone high in the atmosphere, which provides protection from the sun’s rays, ground level ozone is mostly caused by chemical reactions in urban and suburban regions.)

Authors also concluded that an additional 2.1 million deaths were caused by fine particulate matter resulting from human activity. Such particles measure smaller than 2.5 microns in width and are called, PM 2.5. These particles have been linked to lung cancer and a variety of respiratory diseases.

The authors noted that climate change could affect air quality in a number of ways. Moist or wet regions, for example, might see less ozone production, while drier areas might see more.

Different climate models provided widely differing forecasts, the researchers said, with some models estimating an overall decrease in mortality. When these models were averaged together, the effects of climate change were determined to be small.

“It cannot be clearly concluded that past climate change has increased air pollution mortality,” the authors wrote.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s


  • Skip

    The Republicans would like to do away with environmental agencies, regulations and laws, so we can be more like communist China and eat pollution with every meal.