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
Polygamy in North America upheld the constitutionality of Canada's anti-polygamy laws again. In the United States, 19% of people believe that polygamy is morally acceptable, according to a 2018 Gallup poll. [[Category:Marriage, unions and partnerships in Canada]] [[Category:Marriage, unions and partnerships in the United States]] [[Category:Mormonism and polygamy]] [[Category:North American culture]] [[Category:Polygamy|North America]] Polygamy in North America Polygamy is the practice of taking more than one spouse. Polygyny is the specific practice of one man taking more than one wife: it is a common marriage pattern in some parts of the world. In North America polygamy has not been a culturally normative or legally