WASHINGTON - Thousands of protesters, including a Nobel laureate and a film star, are slated to join hands and encircle the White House on Sunday in opposition to TransCanada's Keystone XL pipeline.
The demonstration is the latest in a series of White House protests aimed at convincing U.S. President Barack Obama to block the $7 billion project that would carry Alberta oilsands crude through six American states to Gulf Coast refineries.
Mark Ruffalo, nominated for an Academy Award last year, and Jody Williams, winner of the 1997 Nobel Peace Prize for her work on banning landmines, are among the celebrities scheduled to speak at the rally.
Obama is in Washington, and will likely be inside the White House as the protest unfolds.
The Obama administration is currently weighing whether to give the green light to Keystone XL.
The U.S. State Department is making the ruling because the pipeline crosses an international border, but the president has said the final decision will reflect his views and suggested he isn't swayed by the argument that the pipeline will create jobs.
"Folks in Nebraska, like all across the country, aren't going to say to themselves, 'We'll take a few thousand jobs if it means our kids are potentially drinking water that would damage their health,"' Obama said in an interview with an Omaha TV station.
"We don't want, for example, aquifers to be adversely affected. Folks in Nebraska obviously would be directly impacted."
A decision on the pipeline was supposed to be made by the end of the year, but the State Department suggested last week that it might defer the decision as they continue to assess whether Keystone XL is in the national interest of the United States.
Keystone XL has become a political hot potato for the Obama administration, especially since the release of emails that suggest a cosy relationship between State Department officials and TransCanada's chief lobbyist, Paul Elliott.
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Elliott worked on Secretary of State Hillary Clinton's unsuccessful presidential bid in 2008.
There have also been allegations that the State Department failed to do an impartial environmental assessment of Keystone XL by hiring an environmental consulting firm, Houston-based Cardno Entrix, recommended to it by TransCanada itself.
With a presidential election less than a year away, key Obama advisers are reportedly growing increasingly nervous about losing supporters if they approve Keystone XL.
The pipeline's opponents point to a series of recent spills along oil pipelines and argue the Keystone XL project is a disaster waiting to happen as it would carry millions of barrels a week of carbon-intensive oilsands crude through environmentally fragile areas of the U.S. Great Plains.
Proponents, meantime, say the pipeline will create thousands of much-needed jobs and help end American reliance on oil from volatile and sometime hostile OPEC regimes.
The project has not only become a symbol of the increasingly heated debate in the United States about the country's reliance on fossil fuels and a perceived reluctance to embrace renewable sources of energy, but also the distrust many Americans feel towards big corporations.
Pipeline opponents have said their anti-Keystone protests reflect larger scale public anger at corporate greed, pointing to the Occupy Wall Street demonstrations.
"You can't occupy the White House, but you can surround it," Bill McKibben, a leading U.S. environmentalist and one of the protest's organizers, told a news conference last week.
Keystone XL has become a flashpoint for the environmental movement in the U.S. following last year's failed federal climate change legislation. More than 1,000 protesters were arrested this summer in two weeks of sit-ins outside the White House.
The Nebraska legislature, meantime, is in special session considering legislation that could force TransCanada to reroute the pipeline away from the Ogallala aquifer, a major source of drinking water for the region.