Regarding Charles Ainsworth's Dec. 18 letter, "Rein in yen for shaking science," I suggest Ainsworth review the findings of the U.N. International Panel on Climate Change, or those of The National Academy of Sciences, or The Royal Society paper "Climate Change: A Summary of the Science," or perhaps the document signed by America's 18 leading scientific organizations. They all affirm the same inescapable fact: The climate is changing and human activities are the primary cause.

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ivor paul kaplin