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A new State Department report is the latest evidence that the long-delayed Keystone XL oil pipeline from Canada should be approved, supporters say.

The draft report, issued Friday, finds there would be no significant environmental impact to most resources along the proposed route from western Canada to refineries in Texas. The report also said other options to get the oil from Canada to Gulf Coast refineries are worse for climate change.

The new report “again makes clear there is no reason for this critical pipeline to be blocked one more day,” said House Speaker John Boehner, R-Ohio. After four years of what he called “needless delays,” Boehner said it is time for President Barack Obama “to stand up for middle-class jobs and energy security and approve the Keystone pipeline.”

Environmentalists see the State Department report in a vastly different light.

They say it was inadequate and failed to account for climate risks posed by the pipeline. The report also is based on a false premise, opponents say — namely, that tar sands in western Canada will be developed for oil production regardless of whether the Keystone XL pipeline is approved.

“Americans are already suffering from the consequences of global warming, from more powerful storms like Hurricane Sandy to drought conditions currently devastating the Midwest and Southwest,” said Daniel Gatti of the group Environment America. Production of oil from Canadian tar sands could add as much as 240 billion metric tons of global warming pollution to the atmosphere, Gatti said, a potential catastrophe that would hasten the arrival of the worst effects of global warming.