Where is everyone? Crowded on your doorstep if you believe the group NumbersUSA, a group dedicated to reducing all immigration, even legal immigration. (I heard about them from this NPR story.) Whatever their real reasons for opposing immigration may be – misanthropy, nostalgia, bigotry, fear of change – their argument about environmental degradation in the USA is a lot of hooey. The biggest problem with our treatment of the natural world here in the US of A is our history of gobbling up space as if there’s no tomorrow! Consider these maps:
This is a map of the population density (people per square mile) in the lower 48 with 2004 Census data. Note that nearly all of the land is settled at the lowest density on the map, less than 250 people per square mile. (Much of it is at much less than that!) The high concentrations are where the cities are. If we weren’t so violently opposed to city life…
“I view great cities as pestilential to the morals, the health and the liberties of man. True, they nourish some of the elegant arts; but the useful ones can thrive elsewhere; and less perfection in the others, with more health, virtue and freedom, would be my choice.”
–Thank you, Thomas Jefferson!
…perhaps we would concentrate our citizens there and leave the rest of the continent as a garden. Even in those diseased parts of the nation that are highly urban, the density is not nearly so great as what is common in the rest of the world. Consider this next map of the metro area around New York City.
Note how the higher density areas are relatively small, and are almost all within the five boroughs of NYC. The area to the northeast of Manhattan, Bergen County, NJ, is one of the most densely populated regions of the country, but it is settled at about 2500 per square mile. As I like to say, the USA is mostly unpopulated empty space. To put these figures in world perspective, consider this chart:
This graph shows many data items and has two axes. The black curve on the top (refer to left axis) shows that about 97% of the USA population lives on only 50% of its land. 80% of the population lives on about 7% of the land. (15% of the population lives within 50 miles of I-95 between Boston and Washington, DC.)
The blue curve refers to the right axis, and shows that 90% of the land is settled at densities so low that they barely register on the axis.
Manhattan, our most densely populated place, is only twice as dense as ALL of Bangladesh. If you factor in Brooklyn, Queens, Bronx, and Staten Island, NY City is about as dense as ALL of Japan. Many world cities are much denser than American ones as few cities in the USA even approach the density of NYC, let alone Manhattan!
The horizontal dashed lines show the densities of some modernized countries – clearly people are crammed in – comfortably from what I’ve seen and heard – at rates that far exceed what we have here in the USA.
So, if we want to pave over the USA and have everyone live in a McMansion, then maybe we should cut back on our immigration and population growth. If we want to use resources wisely, I don’t see anything to worry about.