Cato@Liberty:  “The New Orleans-based Fifth Circuit, the federal court of appeals  . . . has allowed a class action lawsuit by Hurricane Katrina victims to proceed against a motley crew of energy, oil, and chemical companies.  Their claim: that the defendants’ greenhouse gas emissions raised air and water temperatures on the Gulf Coast, contributing to Katrina’s strength and causing property damage. Mass tort litigation specialist Russell Jackson calls the plaintiffs’ claims “the litigator’s equivalent to the game ‘Six Degrees of Kevin Bacon.’”