Was ExxonMobil better at climate science than the Intergovernmental Panel on Climate Change (IPCC)? This is the bizarre position now being adopted by climate activists such as Harvard’s Naomi Oreskes and 350.org’s Bill McKibben. As early as 1977, Exxon researchers “knew that its main product would heat up the planet disastrously,” McKibben claimed in the New Yorker last month. “Present thinking,” an Exxon researcher wrote in a 1978 summary, “holds that man has a time window of five to ten years before the need for hard decisions regarding changes in energy strategies might become critical.”
Ten years later, in 1988, the World Meteorological Organization and the United Nations Environment Programme jointly established the IPCC and, according to a U.N. General Assembly Resolution, tasked it with preparing “a comprehensive review” of the state of knowledge of the science of climate change. Two years later, the IPCC produced its first assessment report. By the late 1980s, the threat of human-driven climate change had, Oreskes wrote in the New York Times last week, “become an observed fact.”