"OTTAWA — The government of Canada formally declared bisphenol A, a chemical widely used to create clear, hard plastics, as well as food can liners, to be a toxic substance on Wednesday."

Tighter regulation of toxic chemicals that often threaten people's health isn't going to happen in the current Congress. The reason: a strong industry lobbying effort.

"A Chinese drywall  manufacturer facing thousands of homeowners' court claims and several other companies have agreed to pay to repair 300 homes in four states in a pilot program, an attorney involved in the deal said Wednesday."

"Have hundreds of millions of dollars in grants from major oil companies compromised the ethics of energy research at such institutions as UC Berkeley, UC Davis and Stanford?"

"A female humpback whale traveled more than 6,000 miles from Brazil to Madagascar, setting a world record for a migrating mammal, researchers reported on Wednesday."

"The U.N. panel of climate scientists agreed on Thursday to change its practices in response to errors in a 2007 report, and its chairman, Rajendra Pachauri of India, dismissed suggestions he should step down.

"The Obama administration made a gesture of support for the ethanol industry on Wednesday, with a declaration by the Environmental Protection Agency that gasoline retailers can sell fuel blends containing up to 15 percent ethanol for use in late-model cars."

"Scientists are poised to eliminate the deadly cattle disease Rinderpest, ending a malady that has devastated animal herds for centuries, the United Nations Food and Agriculture Organization said on Thursday."

"The decade-long  effort to pass comprehensive climate legislation  framed around a declining cap and trading for carbon dioxide emissions died an ignominious death. Now new proposals focused on a  substantial ramp-up of investments in energy innovation are percolating — and instantly being attacked."

Ranchers are finding new ways to deter wolves.