The Environment and Us: North America

"Canada, the United States, and Mexico make up the largest part of the continent of North America. The countries of Central America also are part of the continent, and several islands, including the West Indies and Greenland, are associated with North America. It is third in size and fourth in population among Earth’s continents ... "

"North America’s human landscape closely mirrors that of its physical environment: varied, rich, and constantly changing ... "

"North America is one of three continents (along with South America and Oceania) that make up the "New World." The continents were new to 15th-century European explorers, but old to the indigenous people living there ... "