Quick: How many kinds of gasoline do we use in America? Most people would say three or six: regular unleaded, mid-grade, and premium, along with the ethanol blends of the same that have become nearly universal. The actual number is somewhere above 45, though hard to pin down exactly, according...

The chances of seeing a properly valued, revenue-neutral carbon tax are about as likely as the chances of seeing a unicorn-powered spaceship. The idea would cause nothing but misery. Here are a few reasons why:

When economies are already laboring under too much spending, and are at diminishing-return levels of taxation, implementing a carbon tax would be a mistake.

The United Nations conference in Copenhagen will follow in the hypocritical footsteps of Kyoto, with countries declaring their resolution to curb GHG emissions while at the same time either refusing to pay the costs or claiming exemption from controls.

There is a great deal to remember this week, the one year anniversary of the devastating Tohoku earthquake, tsunami, and nuclear crisis. Few events in recent history have combined to such an intense degree natural disaster, technological failure, humanitarian relief, and government scrutiny. 

A debate over policy responses to greenhouse gas emissions.

Schwartz and Hayward offer an alternative analysis of air pollution levels, trends, and prospects in metropolitan areas across the United States.

The U.S. Supreme Court recently rebuffed environmentalists in their bid to get the judiciary to intervene in the global-warming controversy by invoking the old common law of nuisance, as though global warming could be solved through an injunction.