Breakthrough Institute co-founder, Ted Nordhaus, explores the etymology of "carrying capacity" from a shipping term to a biological term, but objects to its application to human population. Richard Heinberg of the Post Carbon Institute responds.
Not only are suburbs growing, many of the larger, older cities that had reversed decades of population decline, are now losing population, again. The biggest losers: counties with the greatest population densities.
An estimated 5 million Native Americans lived in the area that would become the United States when Christopher Columbus arrived in 1492. After reaching a low in the late 19th century, the Native American population has almost fully recovered.