The big automakers are retooling their factories to produce greener cars but many of these vehicles won't hit the road for years. Ira Flatow talks with guests about outside-the-box ideas for improving fuel efficiency and reducing greenhouse gas emissions quickly.
Anna Jaffe, co-founder, Vehicle Design Summit, student, Massachusetts Institute of Technology, Cambridge, Mass.
Simon Hauger, former teacher, West Philadelphia High School, advisor to the West Philly Hybrid X team, Philadelphia, Pa.
Matthew Doude, team leader, Mississippi State EcoCAR, graduate student in mechanical engineering, Mississippi State University, Mississippi Stare, Miss.