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
Sports in North America Sports in North America There is a wide variety of organized sports in the continent of North America. The continent is the birthplace of several of these organized sports, such as basketball, gridiron football (including both American and Canadian games), ice hockey, lacrosse, racquetball, rodeo, ultimate, and volleyball. The modern versions of baseball and softball, skateboarding, snowboarding, stock car racing, and surfing also developed in North America. Sports leagues in Canada and the United States use a closed, franchise model which has the same teams playing every year, with occasional additions of expansion teams or relocations of existing teams. Leagues