"LOS ANGELES -- The head of Southern California Gas Co said it would take at least three more months to plug a massive underground leak of natural gas that has been seeping into the air since mid-October and now accounts for a quarter of the state's entire methane emissions."

"US House Republicans voted Tuesday to block President Barack Obama's regulations on reducing greenhouse gas emissions -- a move certain to spark his veto -- as negotiators work on a global climate deal in Paris."

"A non-profit funded by the Coca-Cola Co. to combat obesity is disbanding following revelations about the beverage maker’s involvement with the group."

"The Obama administration is threatening to veto a House bill overhauling federal energy policy."

"The shaggy offspring of the United States' only wild, purebred herd of bison are pitting Montana conservationists, federal wildlife managers, ranchers and Native American tribes against each other."

"A federal judge ordered Anadarko Petroleum Corp to pay a $159.5 million civil fine reflecting its stake in the Gulf of Mexico well where a 2010 blowout caused the largest U.S. offshore oil spill."

"International leaders gathering in Paris to address global warming face increasing pressure to tackle the issue of 'climate refugees.' Some island nations are already looking to move their people to higher ground, even purchasing land elsewhere in preparation. In the U.S. Northwest, sea level rise is forcing a Native American tribe to consider abandoning lands it has inhabited for thousands of years."

"From droughts to pests, disease, wildfire, and extreme weather, the agency spotlights food and agriculture at COP21."

"As world leaders gather in Paris this week to negotiate a new global climate agreement, the U.S. Department of Agriculture (USDA) is sounding the alarm about the enormous challenges ahead for the food we eat.

"The dean of Columbia’s Graduate School of Journalism published a letter on Tuesday strongly disputing accusations by Exxon Mobil that journalists from the school had produced inaccurate and misleading articles about the company’s knowledge of the risks of climate change."

"Brazil filed a lawsuit on Monday against two of the world's largest mining companies for 20 billion Brazilian reais ($5.2 billion) to clean up what it says was its worst environmental disaster, caused by the collapse of a tailings dam."