"OTTAWA — Faced with uncertainty over its proposed Keystone XL pipeline, which would link Canada’s oil sands with the American Gulf Coast, TransCanada said on Thursday that it would build a pipeline to eastern Canada."

"Climate change pollution from the airline industry is massive. Each plane that takes off emits about the same amount of carbon as 3,500 cars."

"Once black with oil, the Kalamazoo River runs clear now. But EPA orders dredging and says it will be years before the spill's long-term effects are known."

"VANCOUVER, Wash. -- Port of Vancouver commissioners voted Tuesday to approve a lease for a Columbia River terminal that would take in crude oil by train from North Dakota and ship it to West Coast refineries."

"The number of spills and other accidents from railroad cars carrying crude oil has skyrocketed in recent years, up from one or two a year early in the previous decade to 88 last year."

"SAN BRUNO -- Taking a tougher stand against PG&E, a revamped state regulatory body on Tuesday recommended that the utility be fined at least $300 million -- the largest ever imposed by the Public Utilities Commission -- as part of a $2.25 billion penalty for the company's role in the deadly San Bruno natural gas explosion."

"LAC-MEGANTIC, Quebec -- Two residents of the Quebec town of Lac-Megantic, where a runaway train derailed and exploded into a wall of fire that killed 50 people, have launched a class action lawsuit to win compensation for the small community."

"AUGUSTA, Maine -- A steep decline in revenues from pipeline tariffs and a loophole that allowed companies shipping crude by rail to avoid payment have slashed Maine's oil-spill fund to levels experts say could hurt its ability to respond to an accident."