Denver, Colorado. Environmentalists rally at the Colorado state capitol to oppose the planned Keystone XL pipeline, which would transport tar sands oil from Canada to the U.S. Gulf Coast. Credit: Jim West/Alamy Live News

- Image ID: E0PDCF
Denver, Colorado. Environmentalists rally at the Colorado state capitol to oppose the planned Keystone XL pipeline, which would transport tar sands oil from Canada to the U.S. Gulf Coast. Credit: Jim West/Alamy Live News
Jim West / Alamy Stock Photo
Image ID: E0PDCF
Location: Denver, Colorado USA

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