A fairer and more effective carbon tax

Given available technologies, current consumption behaviour is incompatible with the goal of keeping global warming below 2 °C. Economists present carbon pricing as the most efficient tool to induce people to adjust their consumption behaviour. This Perspective critically analyses the ethics, economics and politics of one key form of carbon pricing: carbon taxes are levied to discourage fossil-fuel-intensive consumption. The core claim of this Perspective is that progressive individual carbon taxes (that is, taxes whose rate increases the more emissions an individual generates) are not only more effective but also more just than the flat-rate carbon taxes prevalent today.