Comment Re:We really need (Score 1) 533
Area of Europe: 10.18 million km
Area of USA: 9.827 million km
So "All of Europe" is slightly larger than the USA, not "half the size".
You're comparing a continent to a country. Your Area of Europe at 10.18 million km^2 includes the area of Russia, which by itself is nearly 4 million km^2. The area of the EU, which is likely what the OP was actually discussing, is 4.2 million km^2 (and that includes countries added as recently as last year), which is indeed "half the size" of the area of USA.
The important part is the population density. For the EU it is 112 people per km^2. The population density of the USA is 1/3 that, at 35 people per km^2. Now if you want to compare entire continents, then try North America and Europe, which gives you 12 people per km^2 to 51 people per km^2 respectively.