"The panel named by President Obama to investigate the BP Deepwater Horizon blowout on Tuesday rejected a call by a consumer activist group for the resignation of its chief counsel, Fred H. Bartlit Jr. The group, Consumer Watchdog, said that the panel should dismiss Mr. Bartlit because his law firm, Bartlit Beck Herman Palenchar & Scott, once represented Halliburton, one of the companies involved in drilling the BP well."

"A far-reaching food safety bill that could give the government more power to prevent foodborne illnesses has become a target of advocates for buying food produced locally."

A new method of manipulating the genetic code of agricultural plants, known as targeted mutation, uses only genes that already exist in the plant. It may upend the debate over "genetic engineering."

"After Pittsburgh City Council gave final approval Tuesday to a ban on natural-gas production in the city, industry opponents vowed to press for similar prohibitions at the Allegheny County and state levels."

"Sixteen areas, including Los Angeles, Tampa and Cleveland, have unhealthful amounts of lead in the air that violate national standards, the U.S. Environmental Protection Agency announced Tuesday."

"States with coastal water that is becoming more acidic because of carbon dioxide should list them as impaired under the Clean Water Act, the U.S. Environmental Agency said."

"As President Obama pushes for ratification of his signature nuclear treaty with Russia in coming days, all eyes are on one Republican."

"At least one energy measure will see congressional action this week, and a handful of hopeful Senate Democrats have lofty plans to cut through the partisan gridlock of recent months to move several climate and energy bills by year's end."

"They wind underground beneath homes, across plains and through the state's most populous cities. And, according to a Houston Chronicle investigation, more than half of the major natural gas transmission lines in Texas were laid more than 40 years ago and now are vulnerable to failure."