sentences:  In this capacity, he helped lead the "Jumpstart Ford" campaign (a joint initiative between Global Exchange, the Rainforest Action Network, and the Ruckus Society) which pressured Ford Motors to eliminate tailpipe emissions from its vehicles by 2020.The campaign was later expanded to include all automakers, and renamed "Freedom From Oil".As part of this campaign, Hudema interrupted General Motors CEO Richard Wagoner at the keynote address of a Los Angeles automotive show and asked him to sign a commitment to make General Motors vehicles the most fuel efficient in the world by 2010 (Wagoner refused to sign, saying that his "speech spoke for itself").