New York resident Colin Beavan calls himself "no impact man."

For one year, he adopted a "back to nature" lifestyle in the middle of Manhattan, living in a way that would have "no impact" on the environment.

He describes himself as "a guilty New York liberal who decides to practice what he preaches for one year."

Beavan's project is the focus of the documentary No Impact Man.  Click play for his comments on the experience to CBN News.