A small number of scientists disagree that global climate change is caused by human activity. However, scientific consensus supports the idea that human activity is affecting climate. This is possible because
Answer
A
scientific consensus does not require the agreement of all scientists.
B
the idea is an emerging scientific idea that has not been tested repeatedly.
C
the idea that global climate change is caused by human activity is a scientific theory.
D
scientific consensus does not require a large number of scientists to support an idea.
Explanation
Scientific consensus means that the great majority of experts agree based on the available evidence; it does not mean every scientist agrees. So a small number of scientists can disagree while consensus still supports the conclusion that human activity affects climate. The correct choice is “scientific consensus does not require the agreement of all scientists.”
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