Economist Nicholas Stern evaluates the economic future, and the essential steps we must take to protect growth and reduce poverty while managing climate change. The future Stern outlines is optimistic and pragmatic; he believes we have the capacity and creativity to change. But we need the will...

To estimate the emissions reductions and costs of a climate policy, analysts usually compare a policy scenario with a baseline scenario of future economic conditions without the policy. Both scenarios require assumptions about the future course of numerous factors such as population growth,...