From the school strikes for climate, to Extinction Rebellion protests and calls for a Green New Deal, citizens around the world are putting pressure on their governments to prevent global warming more than 2°C above pre-industrial levels. In the U.K., these efforts have met with some success—the government has declared a “climate emergency” and promised to reduce greenhouse gas emissions to net zero by 2050. Even so, scepticism persists in some quarters: the chancellor of the exchequer, Philip Hammond, has argued that the U.K. government’s goal may be unaffordable, based on estimates that the transition to a ... (full story)