The impact of domestic population growth on the US environment is the focus of a tiny 3-person, 2-year-old office within the EPA. The Future Studies Unit was set up more than 20 years after Congress initially declared population to be a significant factor in environmental policy. The office focuses on possible demographic, technological and economic changes that could affect or result from a surge in US population. Host Steve Curwood talks with the office’s head, David Rejeski.