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CHAPTER 16 - Air quality issues

primary air pollutants types of unmodified materials that, when released into the environment in sufficient quantities, are considered hazardous
secondary air pollutants pollutants produced by the interaction of primary air pollutants in the presence of an appropriate energy source
criteria air pollutants those air pollutants for which specific air quality standards have been set by the U.S. Environmental Protection Agency
hazardous air pollutants (air toxins) certain airborne compounds with high toxicity
cardon monoxide (CO) a primary air pollutant produced when organic materials, such as gasoline, coal, wood, and trash, are incompletely burned
particular matter minute solid particles and liquid droplets dispersed into the atmosphere
carcinogenic the ability of a substance to cause cancer
sulfur dioxide (SO2) a compound containing sulfur and oxygen produced when sulfur-containing fossil fuels are burned. When released into the atmosphere, it is a primary air pollutant
oxides of nitrogen primary air pollutants consisting of a variety of different compounds containing nitrogen and oxygen (NO, N2O, and NO2)
nitrogen monoxide (NO) a compound composed of one atom of nitrogen and one atom of oxygen; a primary air pollutant
nitrogen dioxide (NO2) a compound composed of one atom of nitrogen and two atoms of oxygen; a secondary air pollutant
volatile organic compounds (VOCs) airborne organic compounds; primary air pollutants
hydrocarbons (HC) group of organic compounds consisting of carbon and hydrogen atoms that are evaporated from fuel supplies or are remnants of the fuel that did not burn completely and that act as a primary air pollutant
ozone (03) a molecule consisting of three atoms of oxygen that absorbs much of the sun’s ultraviolet energy before it reaches the Earth’s surface
photochemical smog a yellowish-brown haze that is the result of the interaction of hydrocarbons, oxides of nitrogen, and sunlight
thermal inversion the condition in which warm air in a valley is sandwiched between two layers of cold air and acts like a lid on the valley
acid deposition the accumulation of potential acid-forming particles on a surface
acid rain (acid precipitation) the deposition of wet acidic solutions or dry acidic particles from air
greenhouse gas gas in the atmosphere that allows sunlight to enter but retards the outward flow of heat from the Earth
greenhouse effect the property of carbon dioxide (CO2) that allows light energy to pass through the atmosphere but prevents heat from leaving; similar to the action of glass in a greenhouse
carbon dioxide (CO2) a normal component of the Earth’s atmosphere that in elevated concentrations may interfere with the Earth’s heat burned
methane (CH4) an organic compound produced by living organisms that is a greenhouse gas
nitrous oxide N20, one of the oxides of nitrogen
radon radioactive gas emitted from certain kinds of rock; can accumulate in very tightly sealed buildings
decibels a unit used to measure the loudness of sound
Created by: Jessica C