The US population has hit 300 million people, just 39 years after it reached 200 million, according to US Census Bureau estimates.
http://news.bbc.co.uk/2/hi/americas/6057004.stm
According to the CIA factbook entry for the USA, it has 9,161,923 sq km of land within it's borders so by my calculations the USA has a density of 31 people per sq km or 79 people per sq mile.
Not enough food left for thought soon.
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