Unit 7: Atmospheric Pollution (Chapter 15)

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15 Terms

1

Air pollution

The introduction of chemicals, particulate matter, or microorganisms into the atmosphere at concentrations high enough to harm plants, animals, and materials such as buildings, or to alter ecosystems.

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2

Particulate matter (PM/ particulates/particles)

Solid or liquid particles suspended in air.

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3

Haze

Reduced visibility.

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4

Photochemical oxidant

A class of air pollutants formed as a result of sunlight acting on compounds such as nitrogen oxides

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5

Ozone (O3)

A secondary pollutant made up of three oxygen atoms bound together.

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6

Smog

A type of air pollution that is a mixture of oxidants and particulate matter.

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7

Photochemical smog (Los Angeles-type Smog; Brown smog)

Smog that is dominated by oxidants such as ozone.

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8

Sulfurous smog (London-type smog; Gray smog; industrial smog)

Smog dominated by sulfur dioxide and sulfate compounds.

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9

Volatile organic compound (VOC)

An organic compound that evaporates at typical atmospheric temperatures

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10

Primary pollutant

A polluting compound that comes directly out of a smokestack, exhaust pipe, or natural emission source.

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11

Secondary pollutant

A primary pollutant that has undergone transformation in the presence of sunlight, water, oxygen, or other compounds.

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12

Thermal inversion

A situation in which a relatively warm layer of air at mid-altitude covers a layer of cold, dense air below.

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13

Inversion layer

The layer of warm air that traps emissions in a thermal inversion.

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14

Asbestos

A long, thin, fibrous silicate mineral with insulating properties, which can cause cancer when inhaled.

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15

Sick building syndrome

A buildup of toxic pollutants in an airtight space, seen in newer buildings.

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