The Endangered Species Act (ESA) is among the nation's most important and powerful environmental laws. It is also a source of great conflict and controversy.

Reform is crucial if we are to achieve the Endangered Species Act's ambitious goals and conserve the world’s endangered plants and animals.

On May 14, Interior Secretary Dirk Kempthorne announced that the Department of the Interior had classified the polar bear as a threatened species, giving the bears protection under the Endangered Species Act (ESA). The decision was itself momentous, the first listing of a species under the ESA in which the...

On November 29, the U.S. Supreme Court will hear oral argument in Massachusetts v. Environmental Protection Agency (EPA). In this much-watched case—part of a broader campaign for the regulation of carbon dioxide—several states and environmental organizations have argued that the EPA must regulate CO2 under the Clean Air Act.

On April 2, the Supreme Court of the United States dropped a bombshell on U.S. climate policy: the Court ruled 5 to 4 in Massachusetts v. Environmental Protection Agency (EPA) that the EPA was now forced to regulate vehicular greenhouse gas emissions as specified in Section 202 of the Clean...

This incisive volume considers the impact of precautionary standards on international food security policies and explores its possible unintended consequences--including environmental degradation, the spread of disease, and a hungrier world.

Once again, as another Supreme Court term comes to an end, the AEI Federalism Project has assembled a panel of distinguished experts to examine the fallout. Does the United States Constitution still have a Commerce Clause and a Takings Clause? Or have this year's medical marijuana case and property...