Paper or Plastic?

S1, E10: The United States Post Office teams up with William McDonough to develop a "cradle to cradle" policy that will reduce the USPS's environmental impact; Frederic Scheer of Cereplast creates biodegradable containers made from corn and potato starch; and the designers at Ford present a tour of the recyclable Model U, a concept car that embodies the "cradle to cradle" principle with its hydrogen fuel cell supercharged engine featuring high fuel efficiency and recyclable or biodegradable parts.