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A tropical wet climate exists in the United States only in
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
Increased carbon dioxide may cause global warming by
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
Humans have damaged the ozone layer by using ________________ in refrigerators and spray cans.
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
The most recent major ice age in North America extended as far south as
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
One theory to explain short-term changes in Earth's climate is based on
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
During an ice age, Earth's sea level
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
The gradual increase in the temperature of the atmosphere is known as
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
Earth's ozone layer
lowers.
changes in the sun's energy output.
filters harmful ultraviolet radiation from the sun.
Nebraska and Iowa.
trapping more heat in the atmosphere.
Hawaii.
global warming.
CFCs
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