Name:
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Chapter 12.1: What Causes Air Pollution
Note Summary
Air pollution is the contamination of the
__________________ by wastes from sources
such as industrial burning and automobile
exhausts.
Examples
A primary pollutant is a pollutant that is put
____________________ into the atmosphere
by human or natural activity.
Examples
Air Pollution
Primary Pollutant
A secondary pollutant is a pollutant that forms
in the atmosphere by chemical
______________________ with primary air
pollutants, natural components in the air, or
both.
How does ground level ozone form?
Secondary Pollutant
Sources: Household products, power plants,
and motor vehicles
Activities such as construction and
agriculture are primary sources of:
Examples
What pollutant forms when
automobile emissions react with
oxygen gas and ultraviolet rays?
Primary pollutants: carbon monoxide, nitrogen
oxide, sulfur dioxide, and chemicals called
volatile __________________________
compounds (VOCs).
Sources of Primary Air
Pollutants
The automobile’s contribution to
air pollution includes:
Controlling Vehicle
Emissions
The Clean Air Act, passed in 1970 and strengthened in 1990, gives the Environmental
Protection Agency (EPA) the authority to ________________________ vehicle emissions in the
United States.
Many industries and power plants that generate
our electricity must burn fuel, usually
_______________________ fuel, to get the
energy they need.
When fossil fuels are burned, they release
oxides of:
Industrial Air Pollution
Dry cleaning, oil refineries,
chemical _________________________ plants,
furniture refinishers, and automobile repair
shops all contribute to the VOCs in the air.
Power plants make what fraction
of sulfur dioxide that pollute the air?
Regulating Air Pollution
From Industry
Scrubbers ______________________
some of the more harmful substances
that would otherwise pollute the air.
How does a scrubber work?
Smog is urban air pollution composed of a
mixture of _______________ and
_____________ produced from industrial
pollutants and burning fuels.
True or false:
Smog formed in the presence of
sunlight is a secondary pollutant.
Smog results from chemical reactions that
involve…
Smog
The _____________________________ of air
in the atmosphere usually keeps air pollution
from reaching dangerous levels.
What are the two main causes of
smog?
During temperature inversions, how does the
pollution get trapped?
Temperature
Inversions
What happens during temperature
inversion?
Draw a Picture of what this might
look like.