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STB-2.A.2: Anthropogenic and Natural Air Pollutants
Human sources like the combustion of fossil fuels and natural sources like volcanoes, release nitrogen oxides into the atmosphere. They lead tropospheric ozone, formation of
photochemical smog, and nitric acid in the atmosphere, causing acid rain. Other pollutants are carbon monoxide, hydrocarbons, and particulate matter.

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STB-2.B.3: When does Photochemical Smog reach its peak?
Nitrogen oxide is produced early in the day. Ozone concentrations peak in the afternoon and in the summer because ozone is produced when heat and sunlight cause chemical reactions between  (NOX ) and (VOC), which are also known as hydrocarbons.

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STB-2.C.1: How does Thermal Inversion Work?
During a thermal inversion, the normal temperature grade in the atmosphere is altered from (bottom to top) hot to cold to cold-hot-cold, trapping pollutants near the surface.

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STB-2.D.2: Particulate Matter
There are a variety of natural sources of particulate matter, such as PM10, which causes upper respiratory concerns, and PM 2.5, which causes lower respiratory concerns.

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STB-2.E.1: Carbon Monoxide
Carbon Monoxide is an asphyxiant, attaching to RBC, and with high levels during winter due to fireplaces and furnaces being used a lot more.

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STB-2.E.7: Radon
Radon-222 is a naturally occurring radioactive gas that is produced by the decay of uranium found in some rocks and soils, which can infiltrate through cracks, leading to lung cancer.

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STB-2.G.2: Vapor Recovery Nozzle
A vapor recovery nozzle is a control device on a gasoline pump that prevents toxins from escaping into the atmosphere when fueling a motor vehicle.

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STB-2.J.3: Noise Pollution Consequences
Some effects of noise pollution on animals in ecological systems include stress, the masking of sounds used to communicate or hunt, damaged hearing, and causing changes to migratory routes.

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STB-2.I.3: Acid Rain Effects
Differences in soils and bedrock affect the impact that acid deposition has on the region—such as limestone bedrock’s ability to neutralize the effect of acid rain on lakes and ponds.

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STB-2.H.2: Sources of Acid Rain
Nitric oxides that cause acid deposition come from motor vehicles and coal-burning power plants. Sulfur dioxides that cause acid deposition come from coal-burning power plants.

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STB-2.G.3: Catalytic Converter
A catalytic converter is an air pollution control device for internal combustion engines that converts pollutants (CO, NOx, and hydrocarbons) into less harmful molecules (CO2, N2, O2, and H2O).