"The decision by a small coastal city in Maine to ban the export of crude oil from its harbor brought threats of lawsuits from the oil industry Tuesday and put South Portland on the front lines of a battle over development of Canada’s huge and controversial tar sands deposits."

"Federal regulators said on Wednesday that they would require railroads and oil shippers to use stronger tank cars to transport crude oil within two years."

"The speed of rail tank cars used in crude-by-rail shipments 'is an issue' that the Transportation Department may address in an upcoming safety rule, Secretary Anthony Foxx said."

"Mexico's Senate gave final approval early on Sunday to a bill that aims to boost competition and lower prices in the electricity sector, part of President Enrique Pena Nieto's landmark energy overhaul approved by Congress last year."

"Oil and gas operations have damaged Pennsylvania water supplies 209 times since the end of 2007, according to official determinations compiled by the Department of Environmental Protection that the agency is preparing to release for the first time."

"Twenty-one activists were arrested Monday during a "blockade" of a tar sands company’s construction equipment in eastern Utah, according to anti-tar sands groups who accused Uintah County sheriff’s deputies of 'brutality.'"

"North Dakota’s Heritage Center makes for a jarring sight in this Midwestern prairie capital. The newly-expanded museum consists of four interlocking cubes of stone, steel and glass, a gleaming architectural statement poking out of the otherwise drab Capitol grounds. Each cube features a gallery devoted to an era of North Dakota’s history, but the state’s present is everywhere."

"BOGOTA, Colombia — Cesar Florez is often hesitant to answer his phone because there might be another death threat at the end of the line. Sometimes the threat comes in a phone call, other times in a text message or an email. In April, flyers were posted in the restroom stalls at Florez’s workplace, declaring him and his colleagues 'permanent military targets.'"

"New York state environmental regulators are proposing shutting the giant Indian Point nuclear power plant to protect fish in the Hudson River during summer months, when demand for electricity for air-conditioning is greatest."

"SOUTH PORTLAND, Maine — Tom Blake, like thousands of his neighbors in this coastal town, is used to living alongside the oil industry. Tank farms cluster in neighborhoods, by the park where families watch the movie "Frozen" on a summer night, next to schools and senior citizens apartment buildings. As a child, Blake, the town's former mayor, used to jump into high snow drifts from the massive oil tank next door."