The best way to help the climate is to increase the price of CO2 emissions | Jeffrey Frankel

Political measures and technology have a part to play, but a carbon tax or similar would be most effective

Although many supporters of Donald Trump seemingly believe that global warming is a hoax, almost everyone else agrees that the climate emergency should be at the top of the list of important policy issues. Identifying the problem, however, is not much use unless we also identify the appropriate tools to address it.

In my own field of specialisation, central bankers have caught climate-change fever. Under the leadership of Christine Lagarde, for example, both the International Monetary Fund and now the European Central Bank have declared the planet's climate health to be "mission critical."