In the midwestern United States, ethanol produced from corn is mixed with gasoline to meet clean air standards. Allocating land to produce clean fuel means taking away land from farming. We examine the use of a scarce fossil fuel that causes pollution but may be substituted by a clean fuel...

Fossil fuel use causes the atmospheric accumulation of carbon. The society, endowed with an alternative clean renewable energy, aims at keeping this pollution stock below a prescribed target. The use of an abundant and costly backstop shall follow the exhaustion of the polluting resource; in case...

The declared long-term goal of the Intergovernmental Panel on Climate Change (IPCC) is the stabilization of carbon concentration in the atmosphere. In this paper we impose a carbon target concentration on a partial equilibrium model of the global energy sector. Specifically, we ask whether...

We study how environmental regulation in the form of a cap on aggregate emissions from a fossil fuel (e.g., coal) affects the arrival of a clean substitute (e.g., solar energy). The cost of the substitute decreases with cumulative use because of learning-by-doing. We show that energy prices may...

Many regions such as the European Union and states in the U.S. have introduced mandates aimed at restricting carbon emissions. On the other hand, the stated goal of the Intergovernmental Panel on Climate Change (IPCC) which provides the science behind the current global climate negotiations is...