Canada, Mexico and the United States formed the North American Carbon Atlas Partnership (NACAP) in December 2008 to collaborate in the development of a North American Carbon Storage Atlas (NACSA). This partnership was formally announced by the Presidents of the United States and Mexico and the Prime Minister of Canada at their meeting in Guadalajara, Mexico, in August 2009. The NACAP effort identified and quantified large stationary sources of carbon dioxide (CO2) emissions, identified and screened sedimentary basins suitable for CO2 storage, and estimated the CO2 storage resources of the three most common types of geological media—oil and gas reservoirs, unmineable coal and deep saline formations—in those basins using publicly available geological data. To develop the atlas NACAP had to harmonize storage resource estimation methodologies, define a common scale and resolution, and develop procedures for the treatment of shared sedimentary basins across national borders. Although North America is a large emitter of CO2, the results of the assessments by the three countries demonstrate that potential CO2 storage resources in North America are hundreds, if not thousands, of times greater than current CO2 emissions. Certainly, practical considerations will reduce these estimates. The maps of the large stationary CO2 sources and of the CO2 storage resources show that the sources and storage resources frequently either overlay each other or are within manageable distances of each other, making carbon capture and storage an attractive option to reduce CO2 emissions.