Weighed down by not knowing what to expect of the coronavirus timetable, I spent a day last week reading about climate change. Specifically, I read Three Prongs for Prudent Climate Policy, by Joseph Aldy and Richard Zeckhauser, both of Harvard University’s Kennedy School of Government. Paradoxically I came away feeling better. Grim though the situation they describe is, theirs is anything but a counsel of despair. For three decades, advocates for climate change policy have simultaneously emphasized the urgency of reducing greenhouse gas emissions and provided unrealistic reassurances of the feasibility of doing so. It hasn’t worked out, say Alby…