Lee Schipper of Stanford's PEEC is a grizzled veteran of campaigns to save energy around the world. Schipper has worked at the International Energy Agency in Paris, the World Resources Institute Center for Sustainable Transport in Washington, D.C., and now at PEEC. He's seen the push for efficiency repeatedly run into limits.

Lee Schipper of Stanford's PEEC is a grizzled veteran of campaigns to save energy around the world. Schipper has worked at the International Energy Agency in Paris, the World Resources Institute Center for Sustainable Transport in Washington, D.C., and now at PEEC. He's seen the push for efficiency repeatedly run into limits.

"We think there will be some emissions reduction but it will just be a very small percentage of emissions from transportation," said Chris Ganson, a transport analyst at the World Resources Institute (WRI). "It's still just a drop in the bucket." An analysis by WRI found that the scheme would save less than two days' worth of carbon emissions between now and 2019.

"We think there will be some emissions reduction but it will just be a very small percentage of emissions from transportation," said Chris Ganson, a transport analyst at the World Resources Institute (WRI). "It's still just a drop in the bucket." An analysis by WRI found that the scheme would save less than two days' worth of carbon emissions between now and 2019.

“The new car doesn’t replace the clunker, it replaces the previous first car in the family,” said Lee Schipper, a transportation expert and researcher at the University of California, Berkeley, and at Stanford University.

“The new car doesn’t replace the clunker, it replaces the previous first car in the family,” said Lee Schipper, a transportation expert and researcher at the University of California, Berkeley, and at Stanford University.

“There’s no real way to calculate it without making a bunch of assumptions,” said Lee Schipper, a researcher at the University of California, Berkeley, and at Stanford.

“There’s no real way to calculate it without making a bunch of assumptions,” said Lee Schipper, a researcher at the University of California, Berkeley, and at Stanford.

Transportation expert Lee Schipper of Stanford University and the University of California at Berkeley, said, "The new car doesn't replace the clunker, it replaces the previous first car in the family."

Transportation expert Lee Schipper of Stanford University and the University of California at Berkeley, said, "The new car doesn't replace the clunker, it replaces the previous first car in the family."