
Airborne particles include dust, pollen, dirt, pet dander, insulation and carpet fibers. Particles are often the largest of the pollutants, but are not visible to the naked eye.
Particles are often the largest of the pollutants, but are not visible to the naked eye. Dust and pollen are the two major particles that cause hay fever. Dust is essentially tiny pieces of everything that exists in, or moves through your house. Pollen consists of airborne particles released from trees and other plant life.