"The total land area of the United States is 2.3 billion acres. Of this, about 650 million acres (28.8 per cent) is forested. Another 586 million acres (25.9 per cent) is grassland pasture and range land. “Special uses” account for 525 million acres (23.3 per cent), and the vast majority of this land is natural; state and national parks, wilderness areas and wildlife refuges for the most part. Adding these three figures together, we see that about 78 percent of all the land in the United States is undeveloped. A further 442 million acres (19.5 per cent) is farmland. Adding farmland to the above figure, we can conclude that 97.5 percent of the nation is either undeveloped land, or used to grow crops. The remaining 2.5 per cent is urban area. It puts the word “sprawl” in a little different perspective, doesn’t it?"

I like factoids.