Lukewarmers accept that the earth is warming and that our civilization’s ample CO2 emissions are a major cause. They doubt, however, that climate change represents a crisis unique among the varied challenges we face, or that the global regulatory schemes advanced to deal with it will work as advertised. And they raise an eyebrow at the contrast between the apocalyptic, absolutist rhetoric with which these schemes are regularly defended and their actual details, which seem mostly designed to enable the globe’s statesmen to greenwash the pursuit of economic and political self-interest.
More specifically, lukewarmers look at the Intergovernmental Panel on Climate Change’s official projections and see a strong likelihood that rising temperatures will drag on G.D.P. without leading to catastrophe. They look at the record of climatological predictions and see a pattern in which observed warming hugs the lower, non-disastrous end of the spectrum of projections. And they look at the substance of the Paris accord, which papered over a failed attempt to set binding emission rules with a set of fine-sounding promises, and see little to justify all the anguish and despair over Donald Trump’s decision to abandon it.
