Using the same methodology as in Thursday's post on European wind energy, I took some data from the American Wind Energy Association annual market report and computed the Wind/Fossil ratio for the US. The above graph compares the two. As you can see, Europe is very far ahead in deploying wind infrastructure, relative to the size of its fossil fuel usage.
Partly this is because Europe began large scale deployment of wind earlier:
(though the US is now installing wind capacity at comparable rates).
However, it's also the case that the US uses almost twice as much fossil fuel as the EU-15:
This is despite the fact that the EU-15 population is larger than the US (about 385m versus about 307m), and that Europe also has a slightly larger economic output ($14.8 trillion on a PPP basis in 2009, versus $14.25 trillion for the US, according to the IMF).
The US has a lot of catching up to do...