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
Pirate radio in North America listeners to know when a station is on the air. Geographically, FM and mediumwave pirates tend to cluster in urban areas such as New York City, San Francisco, Toronto, and throughout Florida. However, pirate stations are active throughout all regions of North America. Shortwave pirates are widely dispersed throughout North America and can be heard hundreds and even thousands of miles from their location. Most shortwave pirates operate on the East Coast of the USA. Differing somewhat from the pirate radio stereotype of "kids playing radio," there has been a growing trend towards ethnocentric pirate radio in North America. Usually