Please note that these are estimates based on information known at the level of U.S. zip codes as described in Jones and Kammen (2014). Please see the full publication for detailed description of methods, limitations, results and recommended usage. http://pubs.acs.org/doi/abs/10.1021/es4034364
Using the Data
These data are available for free for non-profit use, if cited properly. Required minimum citation includes the project name, source name, year published, and links back to project page (or displays url). Example: "Source: CoolClimate Maps, U.C. Berkeley CoolClimate Network, 2013, http://coolclimate.berkeley.edu/maps."
Alternative citation (for academic publications)
Christopher M. Jones and Daniel M. Kammen, Spatial Distribution of U.S. Household Carbon Footprints Reveals Suburbanization Undermines Greenhouse Gas Benefits of Urban Population Density. Environ. Sci. Technol., 2014, 48 (2), pp 895–902, dx.doi.org/10.1021/es4034364