Top Stories

• The Energy Department said it will not require a phaseout of incandescent lightbulbs in the United States, citing a need to protect consumer choice. Sixteen states already sued the federal government in November over the anticipated decision not to advance lightbulb efficiency standards — a decision that plaintiffs argue will weaken efforts to address climate change. (The Wall Street Journal)

• The Environmental Protection Agency issued its first guidance on how to address per- and polyfluoroalkyl substances in groundwater. The guidance recommends that water analysts screen for groundwater thresholds of the chemicals at 40 parts per trillion or higher and for PFAS levels in potential drinking water not to exceed 70 parts per trillion, in line with existing drinking water guidance. (The Philadelphia Inquirer)

• Shareholders in Callon Petroleum Co. approved the acquisition of Carrizo Oil & Gas Inc. in a reduced stock offer worth about $750 million, based on Callon’s current offer. The move follows a decision by top Callon investor Paulson & Co. in November to end its opposition to the purchase. (Reuters)