Carbon pricing will be a critical piece in global warming control.

Christine Lagarde and Jim Young Kim write:  Carbon pricing policies are already being implemented by some 40 national governments, including that of China, the world’s largest emitter, and 23 cities, states, and regions that are putting a price on carbon. Many other governments also are reforming energy prices, and more than 400 companies report using a voluntary, internal carbon price. That makes sense. Top companies must effectively manage exposure to climate risk in order to generate higher profits and ensure more stable earnings.  Carbon Pricing