Dirtiest Cities in America – Forbes releases its list of dirtiest cities. (Forbes)

Google Abandons Effort to Make Cheap, Renewable Energy - Google's ambitious plans to make renewable energy more affordable than coal have ended. (Fox News)

Jefferson County Receiver Lobbies for Continued Authority – The court-appointed receiver managing bankrupt Jefferson County’s sewer system warns of harm to the municipal bond market if a federal judge strips him of his authority. (Bloomberg)

A Step Backward for Hybrid Cars? – Federal officials launched a formal safety defect investigation into GM's plug-in hybrid vehicle after crash tests on several Volts resulted in fires. (Los Angeles Times)