"If the Keystone XL oil pipeline were approved today, residents in the six states along its route would not receive equal treatment from TransCanada, the company that wants to build the project.

The differences are particularly striking when it comes to tax revenue and environmental protection. States with stronger regulations have won protections for their citizens, while other states sometimes focused more on meeting TransCanada's needs.

"A US climate scientist at the centre of a row over Republican presidential candidate Newt Gingrich's stance on climate change has spoken out for the first time.

"LAKE ANDES, S.D. (AP) — Famous for its role as Harry Potter's companion in the books and movies, a species of majestic, mostly white owls is being sighted in abundant numbers this winter far from both Hogwarts and its native Arctic habitat.

It's typical for snowy owls to arrive in the U.S. every three or four winters, but this year's irruption is widespread, with birders from the Pacific Northwest to New England reporting frequent sightings of the yellow-eyed birds. As many as 30 were spotted in December around South Dakota's Lake Andes.

"BALTIMORE — As operators of coal-fired power plants around the country welcome a court-ordered delay on tighter pollution rules, the owner of a retrofitted plant here says that the rules cannot come too soon. The company, Constellation Energy, says it is an issue of fairness. A little more than two years ago, it completed an $885 million installation that has vastly reduced emissions from two giant coal-burning units at its Brandon Shores plant here, within view of the city’s downtown office towers."

"In 2014, when expansion of the Panama Canal is complete, a new generation of superlarge cargo ships will begin calling on the East Coast. Cities like New York; Savannah, Ga.; and Miami are vying for the new business, as they race to deepen their ports and expand their facilities to accommodate the new ships."

"The amount of toxic chemicals released into the environment nationwide in 2010 increased 16 percent over the year before, reversing a downward trend in overall toxic releases since 2006, according to a report released Thursday by the Environmental Protection Agency.

The spike was driven largely by metal mining, but other sectors — including the chemical industry — also contributed to the rise in emissions, according to the new analysis from the annual federal Toxics Release Inventory.

"NEW YORK, N.Y. -- The Nuclear Regulatory Commission has rejected a bid by Entergy, owner and operator of the Indian Point nuclear power plant on the Hudson River, to reverse an order to complete legally-required analyses of the facility's severe accident mitigation measures before it can be relicensed."

"In July, New York Attorney General Schneiderman's office won that decision by the Nuclear Regulatory Commission's Atomic Safety and Licensing Board.

"Farmers and the food industry are asking the Obama administration to ease coming federal guidance that will advise consumers to minimize their intake of dioxins, chemicals that may be harmful at certain levels."

"ATLANTA -- For the first time in 20 years, a federal panel is urging the government to lower the threshold for lead poisoning in children."

"The Food and Drug Administration plans to restrict a family of antibiotics commonly used to treat livestock, citing concerns that overuse might promote the development of drug-resistant bacteria that can infect people."