This new interactive map by a team at UC Berkeley lets you explore the average annual household carbon footprint of any county in the United States. They even break down household carbon footprints within each county into subcategories like transportation and housing.
I'm a 24 year old grad student at Caltech in Pasadena, CA, and a big fan of maps. This is where I'll be posting some of my favorites as I find them, as well as some maps I've drawn myself (look for the tag #original or add /tagged/original to the url). Happy browsing!