North America metropolitan area by population in North America: Greater Mexico City. Canada also breaks into the top ten largest metropolitan areas with the Toronto metropolitan area having six million people. The proximity of cities to each other on the Canada–United States border and Mexico–United States border has led to the rise of international metropolitan areas. These urban agglomerations are observed at their largest and most productive in Detroit–Windsor and San Diego–Tijuana and experience large commercial, economic, and cultural activity. The metropolitan areas are responsible for millions of dollars of trade dependent on international freight. In Detroit-Windsor the Border Transportation Partnership study
Discover Life in America Discover Life in America Discover Life in America is a non-profit NGO founded in 1998. It is based in Great Smoky Mountain National Park, and is located near the mountain resort city of Gatlinburg in Sevier County, Tennessee. The primary function of DLIA is to help administer the All Taxa Biodiversity Inventory, a joint effort with scientists and volunteers worldwide to create an inventory of all the living species located in GSMNP. This has been cited as one of the largest efforts of its kind, and has been compared to such efforts as the human genome project in terms of