PrepTest 90+, Section 4, Question 8
Climatologist: The waters off the Pacific coast of North America have warmed about 4 degrees over the past 15 years. Some scientists claim that this trend is a symptom of a more general, global warming caused by human-generated air pollution. However, this conclusion is far from justified—it is known that there are many natural cycles of ocean temperature changes that last 60 years or more.
Climatologist: The waters off the Pacific coast of North America have warmed about 4 degrees over the past 15 years. Some scientists claim that this trend is a symptom of a more general, global warming caused by human-generated air pollution. However, this conclusion is far from justified—it is known that there are many natural cycles of ocean temperature changes that last 60 years or more.
Climatologist: The waters off the Pacific coast of North America have warmed about 4 degrees over the past 15 years. Some scientists claim that this trend is a symptom of a more general, global warming caused by human-generated air pollution. However, this conclusion is far from justified—it is known that there are many natural cycles of ocean temperature changes that last 60 years or more.
Climatologist: The waters off the Pacific coast of North America have warmed about 4 degrees over the past 15 years. Some scientists claim that this trend is a symptom of a more general, global warming caused by human-generated air pollution. However, this conclusion is far from justified—it is known that there are many natural cycles of ocean temperature changes that last 60 years or more.
Which one of the following most accurately expresses the main conclusion drawn in the climatologist's argument?
Some scientists have found evidence that the waters off the Pacific coast of North America have grown significantly warmer over the past 15 years.
The warming of the waters off the Pacific coast of North America is not a symptom of a more general, global warming caused by human-generated air pollution.
The conclusion that the warming of the waters off the Pacific coast of North America is a symptom of a more general, global warming caused by human-generated air pollution is far from justified.
The warming of the waters off the Pacific coast of North America may be the result of a natural cycle of ocean temperature changes.
If the warming of the waters off the Pacific coast of North America is due to a natural cycle of ocean temperature changes, then it is not a symptom of a more general, global warming caused by human-generated air pollution.
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