Air pollution is a mixture of solids and gases found in the atmosphere where are recorded, and tracked for their effect on the health of human beings. Air pollution can include gases, particles and biological pathogens like mold, viruses or bacteria. Air pollution can be especially dangerous for people respiratory or heart conditions, while carcinogenic air pollutions can be poisonous to anyone that breathes it. The size of the particles that are in the air is critically important when determining the best approach to filtering the air we breathe.
Course particle matter that is 10 micrometers (μm) or smaller is categorized as PM10 and documented to increase the rate of lung cancers by 22%. Ultrafine particles, measuring 2.5 μm or PM2.5, reportedly increase the rate of cancer to 36%. They are resulting in approximately 4.2 million deaths per year globally.
Carbon-based or fossil fuel derived is responsible for the largest source of air pollution in urban areas, either from industrial manufacturing operations, farming, or exhaust from most vehicles on our freeways and roads.
Typically, air pollution is a mixture of human-made and naturally occurring particles. So even if you live in an environment not typically exposed to carbon-based pollutants, Mother Nature can still deliver forest fires, pollen, and dust from storms that can be equally harmful, and all are considered form of Air Pollution.