An environmental footprint assessment system is disclosed. The environmental footprint assessment system determines the environment footprint of an entity by analyzing financial information regarding the entity. For example, the environmental footprint assessment system may determine the carbon footprint of a business. The environmental footprint assessment system compares an entity's financial information against a database of environmental impacts to produce an initial carbon footprint assessment for the entity. The initial assessment is reviewed for areas of spending that contribute significant to the entity's carbon footprint. The database of environmental impacts can be refined with additional environmental impact information regarding the areas of significant carbon contribution. A subsequent iteration of the carbon footprint assessment is performed, and an updated carbon footprint assessment is produced. The process is repeatedly iteratively to produce additional carbon footprint assessments.