"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."

"The federal agency responsible for making sure states effectively oversee the safety of natural gas and other pipelines is failing to do its job, a government watchdog said in a report released Friday."

"Weeks away from a decision from the federal government, more than 1,000 people turned up at Vancouver’s Sunset Beach Saturday to rally against the controversial Northern Gateway pipeline."

"The government has failed to inspect thousands of oil and gas wells it considers potentially high risks for water contamination and other environmental damage, congressional investigators say."

"The Obama administration began a process that may result in the first federal regulation of chemicals used in fracking, a drilling technique that has transformed energy production while eluding oversight sought by environmentalists."

"A warning from U.S. scientists that Oklahoma may be hit by a major earthquake has caused a run on insurance policies for tremors in the heartland state, adding to the woes of residents already in the firing line of devastating tornadoes."