Sound public policy addresses externalities directly, when possible. Air pollution is best alleviated by policy instruments that internalize the social cost of pollution, making it attractive to reduce emissions. One such instrument might be a tax levied on individual emissions, if they are...

The authors explore the use of cross-sectional analysis to measure the impacts of climate change on agriculture. The impact literature, using experiments on crops in laboratory settings combined with simulation models, suggests that agriculture will be strongly affected by climate change. The...

Despite the many calls to reform the CDM, its conceptual underpinnings are strong and it will most likely survive in the post-2012 climate regime. Some modifications may be considered in the short term to strengthen the effectiveness and transparency of the mechanism without modifying the...

It is a common perception that primary commodity prices tend to move together. This perception is especially common among commodity traders who may justify an increase in the price of one commodity because the prices of other commodities have increased. This commodity price co-movement can be...

To develop efficient strategies for pollution control, it is essential to assess both the costs of control and the benefits that may result. These benefits will often included improvements in public health, including reductions in both morbidity and premature mortality. Until recently, there has...

This paper develops a new methodology for calculating the"carbon footprint"of air travel whereby emissions from travel in premium (business and first) classes depend heavily on the average class-specific occupied floor space. Unlike methods currently used for the purpose, the approach properly...

The authors evaluate the case for carbon taxes in terms of national interests. They reach the following conclusions. (A) A global carbon tax involves issues of international resource transfers and would be difficult to administer and enforce. It is thus unlikely to be implemented in the near...

The authors analyze inequality in future carbon emissions using a group decomposition of the Gini index. Business-as-usual projections to the year 2100 for 135 countries show inequality in per capita emissions declining, but slowly. They also measure the impact on emissions levels and inequality...

Budgets for extension services have been reduced in many countries. One response to these reductions in public services in some countries has been to privatize extension services - with extension services provided for a fee, by either public agencies or private companies. Under the new approach,...

Mandating emission control devices in new cars is only one of the most obvious steps to address the problem of vehicle emissions. Others range from taxes on gasoline and parking to incentives to scrap old cars or move businesses out of the cities. There are models to simulate the engineering...