Investors have rushed back into North American pipelines after U.S. President Donald Trump revived growth prospects in a sector that struggled to cope with a two-year oil price slump and strident opposition from environmental and Native American activists. Investor confidence in the industry was shaken last year when the administration of former President Barack Obama halted the $3.8 billion Dakota Access Pipeline, just as Energy Transfer Partners ( ETP.N ) had nearly finished building it. Protesters have rallied for months against plans to route the Dakota Access pipeline under a lake near the Standing Rock Sioux reservation in North Dakota, saying it threatened water resources and sacred Native American sites. A year earlier, Obama rejected TransCanada Corp’s ( TRP.TO ) C$8 billion ($6.08 billion) Keystone […]