Studies Show Places in the US that Make the Most of Electric Vehicles “…in the Pacific Northwest, the Bonneville Power Administration (BPA) is the main power generator & that there are lots of dams in that region for hydroelectric generation, which is why the Leaf & the Volt do so well there…” (Thomas Net)

http://news.thomasnet.com/green_clean/2012/05/10/studies-show-places-in-the-u-s-that-make-the-most-of-electric-vehicles/