Environment & Climate Change

Robert Stavins argues for an economic approach to solving environmental problems and explains why "environmental economics" is not an oxymoron.

The United States has considerable tax administration and cap-and-trade expertise that could highlight potentially successful carbon pricing approaches. Although this experience is not climate-related, the United States deploys an efficient and highly compliant excise tax system, and it could assist developing country efforts to build their own capacity to tax carbon. The United States also has long experience with cap-and-trade systems for criteria air pollutants, much of which is transferable to greenhouse-gas emissions trading.

The Kyoto Protocol establishes a very complex and ambitious regime, in architecture if not stringency. The problem is that relatively few states, representing only about a quarter of the world's emissions, have been willing to assume emission targets under Kyoto....The future of the Protocol thus seems doubtful at best. Even in the most optimistic scenario, a new round of emissions targets couldn't be agreed in time to prevent a legal gap between the first and second commitment periods. A possible middle ground would be to establish a transitional regime that would be political in nature, but that could evolve over time into a legally-binding regime.

Negotiations under the United Nations Framework Convention on Climate Change (UNFCCC) at Copenhagen in December 2009 did not produce a new international treaty with binding emissions commitments, but have defined a roadmap for dealing with global climate change in the post-2012 era. As countries continue to pursue new models for global agreement, it will be important to learn from the weaknesses of past approaches, while building on positive aspects of the experience with the Kyoto Protocol so far.

Our proposal for a post-2012 international global climate policy agreement contains three essential elements: meaningful involvement by key industrialized and developing nations; an emphasis on an extended time path of targets; and inclusion of market-based policy instruments. This architecture is consistent with fundamental aspects of the science, economics, and politics of global climate change.