USA The region covers the three countries of Canada, United States and Mexico and associated marine waters. North America is a continent rich in diversity.
Climatic types range from the polar arctic to tropical forests.
Topographically, the continent contains a valley with the lowest elevation on earth and also extensive chains of tall mountains. It is blessed with rich natural resources as well as an unmatched variety of scenic natural beauty. Possessed of great variety among its population of native animals and plants, since before recorded history it has also seen the development of a rich diversity in human cultures. Ecologically, North America is a mosaic. Many of its ecosystems possess unique natural features of worldwide significance and of great individuality.