The fight over the Keystone XL pipeline had all the elements of a classic Washington scrap: protests, political ads, scores of lobbyists on retainer. What was sometimes missing in the seven-year struggle, energy analysts say, was an accurate accounting of the project’s impact on the environment or the economy, the twin issues that drove the debate. Environmentalists said Keystone XL, which TransCanada Corp. first applied to build in 2008, raised the risks of climate change by encouraging greater production of Alberta’s tar sands. But a U.S. environmental review found the project’s contribution to global greenhouse gas emissions would be small. Republican […]