"The leaders of 25 environmental and climate action groups sent an open letter to President Barack Obama on Tuesday, urging him to reject the proposed Keystone XL pipeline and avoid any 'deal-making' with the Canadian government."

"SALEKHARD, Russia -- Russia announced on Tuesday that it had opened a piracy investigation against the crew of a Greenpeace ship after its activists scaled an offshore oil platform in the Arctic last week. The step signaled that the authorities intended to act decisively to thwart more protests against Russia’s ambitious plans to expand energy exploration in the region."

"WASHINGTON — The Obama administration on Friday set the first-ever limits on greenhouse gas emissions from power plants, but their impact could be minimal because they don’t apply to existing plants and there are few coal-fired power plants being built in the United States."

"Airlines on Monday urged a UN aviation group to back a mandatory global framework to curb airline emissions, saying failure to reach a deal would revive threats of a trade war."

"Environmental inspections of oil and gas facilities on public lands have jumped nearly twofold since 2007, but federal investigators said Monday that the government is doing a poor job of targeting the riskiest sites."

"New regulations to oversee hydraulic fracturing of oil and gas wells in Alaska could be issued later this year by state regulators, officials said at a public hearing on Monday."

"KARNES CITY, Texas -- In the five years since the shale boom hit, the once-beautiful hills of south Texas have been transformed into a scarred, industrial landscape. The residents’ health is part of the collateral damage, according to the environmental watchdog group Earthworks. Their new study documents hazardous chemicals in the air and serious ailments reported by families living in close proximity to drilling operations."

"Climate-change activist and author Bill McKibben and Seattle Mayor Mike McGinn headlined a Saturday demonstration against coal and oil exports."

"WASHINGTON — Hunting for offshore oil in remote and unforgiving Arctic waters requires vessels capable of withstanding crushing blows from icebergs, a nearby stash of emergency equipment and other specialized resources, according to a new report from Pew Charitable Trusts."

"The Environmental Protection Agency will move Friday to strictly limit the amount of carbon that future coal- and gas-fired power plants can pour into the atmosphere, the first such restrictions on greenhouse gases imposed by the agency."

"CENTRALIA, Wash. — Proposals to make the Northwest a major coal exporting region have made for a familiar debate over the potential impacts on people and the environment."

"The good news: A sample of what are probably the best fracked wells in the country finds low emissions of methane, a potent heat-trapping gas. The bad news: The study likely missed the super-emitters, the wells that are responsible for the vast majority of methane leakage."

"New rules limiting emissions from U.S. power plants that are expected to be proposed on Friday will 'provide certainty' to the coal industry, environment and energy chiefs told lawmakers anxious about the fuel's future."

"The U.S. government rejected the sale of coal in Wyoming after an auction drew the lowest top bid in 15 years, as the outlook for the power-plant fuel weakens because of cheap natural gas and new rules coming out this week."

"The nominee for Federal Energy Regulatory Commission chairman reached out to executives at oil giant BP PLC for help with the confirmation process, according to emails released yesterday by a conservative think tank opposing his nomination."