In 1980, concerning the greenhouse effect, as it was then called, the “main scientific questions were settled beyond debate,” Nathaniel Rich writes in his book Losing Earth: A Recent History. “As the 1980s began, attention turned from diagnosis of the problem to refinement of the predicted consequences” to solutions, how to reduce carbon emissions. In 1981 a study by NASA scientists confirming this consensus was front-page news, recommending that the United States continue burning oil and gas and coal only “as necessary.”

