A nitrogen footprint tool (NFT) for communities

• Nitrogen footprint tools (NFTs) allow entities to determine the amount of reactive nitrogen lost to the environment as a result of the entities resource use. The community NFT model estimates these loses for census block groups within a given area and for this study Baltimore City, MD.

• The objectives of this study were to: 1) calculate and map the N footprint of Baltimore City, 2) present potential reduction scenarios to reduce this footprint, 3) determine the impact of income on N footprints in Baltimore City, and 4) provide a methodology for additional communities to calculate their N footprints