"A Pennsylvania homeowner and an Indiana golf course company have filed a class-action lawsuit against DuPont charging that the chemical giant was either negligent or reckless in putting a new weedkiller on the market."

"Members of the Nuclear Regulatory Commission appeared divided Tuesday over how to proceed with a staff proposal that calls for nuclear power plants to be better prepared for blackouts and natural disasters."

"In the face of drastic funding cuts and a hostile political environment, U.S. EPA Administrator Lisa Jackson has told her top deputies to rank which of their programs they deem to be essential and which could fall on the budgetary chopping block."

"A government report released Tuesday says states are underreporting violations of federal drinking-water standards, preventing the Environmental Protection Agency from enforcing rules aimed at protecting public health."

The president of Louisiana's St. Bernard Parish lambasted as untrue a ProPublica report that local officials -- nicknamed "spillionaires" -- had cashed in by manipulating cleanup contracts after the BP oil spill. New documents, however, support ProPublica's investigative findings, and raise questions about whether the official testified truthfully under oath before Rep. Darrell Issa's (R-CA) House Oversight Committee.

"When an earthquake launched a tsunami that devastated a Japanese nuclear complex in March, U.S. regulators quickly reassured the public that American reactors were built to withstand the expected severity of earthquakes in their areas. Privately, though, internal emails from March show staffers at the federal Nuclear Regulatory Commission fretted about the public attention on the potential earthquake vulnerability of some U.S. plants."

Weeds in southern Missouri are becoming resistant to Monsanto's Roundup herbicide. Some farmers now resort to chemical cocktails -- or even hoes.

"U.S. EPA announced Friday that it decided against a proposed rule that would have required contractors to test dust to prove the absence of lead following renovations."

"The chairman of the Nuclear Regulatory Commission said Monday that it should decide within 90 days on how to address recommendations to be issued this week by a task force that examined the lessons of the Fukushima Daiichi nuclear accident in Japan. Almost simultaneously, House Republicans and the industry’s trade association warned him not to rush."

"The devastation that bark beetles and fungus have wreaked on hundreds of thousands of acres of whitebark pine trees in the northern Rockies has been tracked and chronicled for 30 years. Now the Fish and Wildlife Service has weighed in with a finding that climate change threatens the long-term survival of the species."