-occurs when gases, dust particles, fumes (or smoke) are introduced into the atmosphere in a way that makes it harmful to humans, animals and plant. This is because the air becomes dirty or contaminated.
-the introduction into the atmosphere of chemicals, particulates, biological materials that cause discomfort, disease, or death to humans, damage other living organisms
-Things that pollute the air
-A substance in the air that can be adverse to humans and the environment
-Can be classified as Primary or Secondary
-gases or particles that are pumped into the air to make it unclean.
-directly produced from a process
carbon monoxide from automobile (cars) exhausts sulfur dioxide from the combustion of coal
-not emitted directly
-they form in the air when primary pollutants react or interact
Ground level ozone – this makes up the photochemical smog
Carbon Monoxide (CO)
-Fuel combustion from vehicles and engines.
-Reduces the amount of oxygen reaching the body’s organs and tissues; aggravates heart disease, resulting in chest pain and other symptoms.
Ground-level Ozone (O3)
-Secondary pollutant formed by chemical reaction of volatile organic compounds (VOCs) and NOx in the presence of sunlight.
-Decreases lung function and causes respiratory symptoms, such as coughing and shortness of breath, and also makes asthma and other lung diseases get worse.
-Smelters (metal refineries) and other metal industries; combustion of leaded gasoline in piston engine aircraft; waste incinerators (waste burners), and battery manufacturing.
-Damages the developing nervous system, resulting in IQ loss and impacts on learning, memory, and behavior in children.
-Cardiovascular and renal effects in adults and early effects related to anemia.
Nitrogen Dioxide (NO2)
-Fuel combustion (electric utilities, big industrial boilers, vehicles) and