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
Genetically modified food in North America a bill requiring labeling for foods made with GMO's, with a similar triggering mechanism as Connecticut's bill. In May 2014 Vermont passed a law requiring labeling of food containing ingredients derived from genetically modified organisms. A federal judge ruled Maui's GMO ban invalid. Genetically modified food in North America Genetic engineering in North America is any genetic engineering activities in North America Mainland Canada is one of the world's largest producers of GM canola and also grows GM maize, soybean and sugarbeet. Health Canada, under the Food and Drugs Act, and the Canadian Food Inspection Agency are responsible for evaluating