Deidre Jones 6 th grade. Any visible or invisible particle or gas found in the air that is not part of the original, normal composition.
Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living.
PARANASAL SINUSES Anatomy, Physiology and Diseases Maria Angelica M. Geronimo Group 5a.
Enhancing and developing eye and vision care worldwide.
