Pipeline company Energy Transfer LP expanded its vast network in 2018, as rising shale production increased throughput domestically and stoked exports. Revenue surged nearly 15% to $54.4 billion and profits hit close to $1.7 billion. The Dallas-based company, whose pipelines carry about a third of the U.S.’s crude and natural gas, ended 2018 by opening its Mariner East II pipeline for liquid natural gas that will increase export capacity off the U.S. East Coast. But it also spent the year grappling with anti-pipeline opposition, and attracted controversy in Pennsylvania after a pipeline explosion in September destroyed a house and sparked complaints about compliance with environmental standards. (The company has said it is committed to addressing the problems in Pennsylvania.)