If anything you are understating it. The average American is much more well off than the average European, much more likely to live in a climate controlled home

If anything you are understating it. The average American is much more well off than the average European, much more likely to live in a climate controlled home that is heated or cooled to a comfortable temperature year round, pays significantly less to fuel his vehicles (and is likely to own more of them), has a bigger home, and so forth.