"The Los Angeles Fire Department says a ruptured oil pipe near the suburb of Glendale has spilled about 50,000 gallons of crude oil onto streets."

"CALGARY, Alberta — With TransCanada’s Keystone XL pipeline snarled in a regulatory and legal struggle south of the border, Canadian oil companies are proposing many new and expanded pipelines that would connect the oil sands fields with new markets in China and across the world."

"Norway wants to let oil and gas companies drill in Arctic seas that were frozen as recently as the 1980s even though some climate experts say it is too early to trust global warming to keep the ice away."

"A foreign oil company convicted of polluting a Texas community's air with dangerous chemicals has gotten off easy in a criminal case that could undercut the prosecution of environmental crimes in the United States. The case revolves around Venezuelan-owned Citgo Petroleum’s decade-long violation of the federal Clean Air Act at its refinery in Corpus Christi."

"Seeking to close what a lawyer called 'serious gaps' in regulation, 64 environmental and community groups on Tuesday petitioned the Environmental Protection Agency to clamp down on toxic air emissions from oil and gas operations."

"Smog could worsen across the United States in the coming decades as climate change boosts summer temperatures and makes ozone levels more difficult to control, a new study says."

"Chemicals in water from deep underground in hydraulic fracturing wells have caused problems as they get to water treatment plants in other states. It’s a potential problem to consider as North Carolina moves closer to allowing fracking."

"The president, who [made] the announcement during a visit to Wal-Mart in Mountain View, California, [also highlighted] commitments by corporations to lift solar generation at their facilities. Wal-Mart, Apple Inc, Yahoo Inc, Google Inc and Ikea were among the companies making such commitments."

"WASHINGTON — A bipartisan bill to encourage energy efficiency in buildings died in the Senate on Monday, derailed by the contentious debate over the Keystone XL pipeline and President Obama’s plans to issue new climate change regulations."