In recent years, many people, including this writer, have written many articles about many types of environmental problems in our water, air, land, food, workplaces and indoor environments.  However, we can be thankful that major progress has been made on many environmental health fronts including outdoor air quality, water quality and lead abatement.

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In recent years, increasing attention has been paid to indoor air quality in schools.   About 57 million students, teachers and staff attend US elementary and high schools. Types of school buildings used in the USA are quite variable and range from new buildings, which often have poor ventilation, to buildings more than one hundred years old, which may have problems with dust, lead paint, and mold and moisture damage. 

A major impetus for school indoor air quality concerns is the high prevalence of asthma in children and adolescents.

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