Follow the Manhattan-based Beavan family as they abandon their high-consumption 5th Avenue lifestyle and try to live a year while making no net environmental impact.   We the People is a free lecture series sponsored by the Congregational, Episcopal, and Unitarian churces of Exeter, in cooperation with Phillips Exeter Academy. Beavan's book, No Impact Man, will be for sale at the film showing by Water Street Bookstore. The viewing is free and open to the public and takes place at the Congregational Church (21 Front Street, Exeter).