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The term " carbon diet " is used in the book Gore : A Political Life " And many scientists and economists maintain that the costs of adapting to any change are both easier to achieve politically and more efficacious scientifically than trying to avoid the problem through a crash carbon diet . "
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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