PORTLAND, Maine – Millions of gallons of crude oil from the nation’s heartland are crossing Maine in railroad tank cars bound for a Canadian oil refinery, raising concern among environmentalists and state officials about the threat of an accident and spill.

The oil is primarily coming from the Bakken shale-oil field in North Dakota, with lesser amounts from neighbouring Canada, where oil production has boomed in recent years. Trains carried nearly 5.3 million barrels of the light crude — more than 220 million gallons — across the state and into New Brunswick last year, and the volume is growing.

Read more: http://tinyurl.com/c2raohr