Health professionals and parents across North America are increasingly concerned about the air quality in schools and the effect poor air quality may have on student health and learning.

"Every year around September, when the schools open, we have an epidemic of visits to our office with asthma attacks,"  Dr. Vincent Osundwa, an Edmonton allergist, recently told the Edmonton Examiner. He points the finger at a whole range of irritants from poor ventilation to fumes from new carpeting.