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
Geography of North America and rich mineral deposits including copper, lead, gold, silver, tungsten, uranium, and zinc. Coal, petroleum and natural gas are mineral fuels found. Old mine tailings are present in the Rocky Mountain landscape. Agriculture and forestry are two major industries. Agriculture includes arid land and irrigated farming and livestock grazing. Livestock are often moved between high-elevation summer pastures and low-elevation and winter pastures. Map and aerial photos Geography of North America North America is the third largest continent, and is also a portion of the second largest supercontinent if North and South America are combined into the Americas and Africa, Europe,