The Commission for Environmental Cooperation (CEC) conducts policy and research work on environmentally preferable goods and services (EPGS) in eleven different activities. One specific activity is to “Identify changes/trends in trade in green goods and services in the NAFTA region.” Lacking any definitive quantification of trade in EPGS, and also lacking any established or consistently used industry codes that result in ongoing government statistics on environmental trade, in 2003 CEC commissioned a study to provide a definition and quantification of trade in EPGS in the NAFTA region. CEC selected Environmental Business International Inc. (EBI), a market research firm dedicated to the environmental industry since 1988, to conduct this research and present a quantification of environmental trade in the NAFTA region.