WASHINGTON (WKZO) -- A reported 35-thousand activists marched in Washington Sunday against the Keystone XL oil pipeline.

Environmental groups gathered on the National Mall and marched to the White House for a climate change rally focusing on the pipeline.  Participants said the issue is a battle between grassroots environmental groups and special interest groups with deep pockets.

President Obama will ultimately decide if the project goes forward because it crosses international boundaries.  The proposed pipeline would carry oil from Canada to the Gulf of Mexico.