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The N-Calculator (part of N-PRINT) is a nitrogen footprint model for an individual. A nitrogen footprint is a measure of the amount of nitrogen released to the environment as a result of human activities. N-Calculator asks questions in the following four areas: food consumption and production, housing (utility usage), transportation, and goods & services. This nitrogen footprint model shows how an individual’s activities, such as diet choices, impact nitrogen pollution and the environment. N-Calculators are available for the United States and the Netherlands.