Friday, January 23, 2009

Pollution and life expectancy

In one of my papers we look at the relationship between wages and pollution making the obvious link to the value of statistical life.

In a recent study for the US the cost of pollution appears to be 21 weeks.

Is that more or less than I would have guessed? Hmmmm. More I suppose. This has two implications

(1) The average Chinese citizen is not going to live as long as they might have thought.

(2) The current recession and global crisis might extend the lives of some in the West as what is left of heavy industry moves to China (see point 1).

Cleaner Air Equals 21 More Weeks Of Life [PlanetArk]

BOSTON - Dramatic improvements in U.S. air quality over the last two decades have added 21 weeks to the life of the average American, researchers reported on Wednesday.

Reducing fine particles given off by automobiles, diesel engines, steel mills and coal-fired power plants have added as much as 15 percent of the 2.72 years of extra longevity seen in the United States since the early 1980s, they wrote in the New England Journal of Medicine.

Changes in smoking habits are the biggest reason why Americans are living longer, said Arden Pope, an epidemiologist at Brigham Young University in Utah who led the study.

Improved socioeconomic conditions, judged partly by the proportion of high school graduates living in an area, rank next. But cleaner air was a big factor.

"It's stunning that the air pollution effect seems to be as robust as it is after controlling for these other things," Pope said in a telephone interview.

Using life expectancy, economic, demographic and pollution data from 51 metropolitan areas, Pope and his colleagues found when fine-particle air pollution dropped by 10 micrograms per cubic meter, life expectancy rose by 31 weeks.

Areas such a Akron, Ohio, and Philadelphia showed that kind of drop in air pollution.

The bigger the decline, the longer people began living.

In some areas where fine-particle counts dropped by 13 to 14 micrograms -- such as Buffalo, New York and Pittsburgh -- people typically started living about 43 weeks longer.

The findings show there has been a real dividend from the efforts since the 1970s to improve air quality, said Pope.

In a commentary, Daniel Krewski of the University of Ottawa said the study "provides direct confirmation of the population health benefits of mitigating air pollution and greatly strengthens the foundation of the argument for air-quality management."

Based on earlier research, the World Health Organization has estimated that 1.4 percent of all deaths around the world are caused by air pollution particles.



Amanda Crowe said...

A new study by the US National Institute of Environmental Health Sciences (NIEHS) has found a strong link between air quality and life expectancy. A study published in the The New England Journal of Medicine (Volume 360:376-386) in January 2009 shows that life expectancy increased in areas where particulate pollution was reduced, and that the more the pollution was reduced.

Perseverance India said...

I was surprised to know that in stone mining areas in India, the life expectancy has gone down to near 40s because of silicosis. Air pollution is killing the poors first.