"A federal appeals court upheld a district judge's decision to drop manslaughter charges against two former BP Plc (BP.L) well site managers over their roles in the 2010 Gulf of Mexico oil drilling disaster that killed 11 people."

"West Virginia lawmakers approved a measure on Saturday to roll back strict water-protection rules enacted last year after a chemical spill contaminated drinking water for 300,000 people in West Virginia’s capital."

"Displeased with legislation introduced earlier this week, Sens. Barbara Boxer (D-Calif.) and Ed Markey (D-Mass.) have drafted their own bill to reform the nation’s chemical laws."

"On a recent afternoon, Gregg Houghaboom pointed to a photo of a fish fillet and asked a room full of ocean experts to identify it. They couldn't. Absent a head, tail and scales, it looked like a hunk of grouper -- but it was actually Lake Victoria perch."

"Over the last year, federal authorities built what appeared to be a strong criminal case against Exide Technologies, the Vernon battery recycler that has long faced scrutiny for spewing lead and arsenic into neighborhoods in southeast Los Angeles County."

"The Canadian government has proposed tough new standards for rail tank cars used to transport crude oil in response to a string of fiery crashes."

"SAN FRANCISCO — Lax oversight by the state has allowed the oil and gas industry to contaminate protected water aquifers and endanger the public, California regulators acknowledged Tuesday while pledging to intensify supervision."

"A bipartisan pair of senators introduced legislation on Tuesday that would overhaul U.S. chemical regulations."