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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

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March 2025
Global Environmental Health Newsletter
Learn More About GEH at NIEHS
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Glossary Term: Asthma

Definition: A chronic lung disease characterized by episodes of airway narrowing and obstruction, causing wheezing, coughing, chest tightness and shortness of breath.

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The NIEHS identifies Global Environmental Health (GEH) as a part of its strategic themes, recognizing that because environmental health problems cross national boundaries, conducting studies around the world benefits not just those in areas being studied, but all people who suffer from the same or related environmental health problems.

Last Reviewed: March 27, 2025