Safety officials have worried for years about hazardous materials carried on trains, but concern has intensified recently as a drilling surge in remote oil fields has generated heavy traffic on North America’s aging rail-freight networks. (Read more… http://www.nytimes.com/2014/01/03/us/concern-over-safety-grows-as-more-oil-rides-the-rails.html)

(English, Article, 2014)

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