Skip to content
My WebMD Sign In, Sign Up

Lung Disease & Respiratory Health Center

Font Size

Windows a Culprit in Air Pollution?

In Sunlight, Grime on Windows May Recirculate Smog Chemical Back Into the Air
By
WebMD Health News
Reviewed by Louise Chang, MD

May 11, 2007 -- Grime on windows may contribute to air pollution, a Canadian study suggests.

Scientists from the University of Toronto did several lab tests on window grime, which they call "urban organic films."

Window grime can soak up an inactive version of the smog chemical nitric acid, note the researchers, who included D.J. Donaldson, PhD, of the University of Toronto's chemistry department and department of physical and environmental sciences.

In a lab, Donaldson's team concocted a solution like window grime and smeared it on a microscope slide.

The scientists observed how the window grime's chemistry changed when exposed to light in a series of lab tests.

Light caused a chemical change in the nitric acid, breaking it down and gradually releasing the mixture into the air.

If the same thing happens outside the lab, it could mean that window grime, in sunlight, recycles smog-related chemicals.

The findings are scheduled for publication in the June 15 edition of the journal Environmental Science & Technology.

 

Today on WebMD

Living With Copd
VIDEO
Lung Disease Health Check
HEALTH CHECK
 
Cigarette butts in ashtray
Article
Household Hazards For People With Copd
Article
 

Bronchitis Overview
SLIDESHOW
Copd Myth Fact Quiz
QUIZ
 
Living With Copd
VIDEO
Energy Boosting Foods
SLIDESHOW
 

cigarette butts snuffed out in ashtray
SLIDESHOW
Healthy Home Health Check
TOOL
 
Senior woman stretching
Article
Diagnosing Copd
VIDEO
 

WebMD Special Sections