Enbridge sign, St. Ignace | Laina G. StebbinsThis article originally appeared on Inside Climate News, a nonprofit, non-partisan news organization that covers climate, energy and the environment. Sign up for their newsletter here. SILER CITY, N.C.—John Alderman opened the letter, sent by certified mail from an attorney in New Orleans. This is trouble, Alderman thought. It can’t be good news. In late April Enbridge, a Canadian company, announced i…