A land footprint is the amount of land used to produce a product and only accounts for actual land area, not greenhouse gas emissions. The National Pork Board's Pig Production Environmental Footprint Calculator estimates the land footprint of swine facilities by accounting for the land needed to produce all feed ingredients. The calculator allows users to understand how individual feed ingredients and changes to them can impact the total land footprint of a farming operation. Environmental footprint calculators help agricultural producers improve efficiencies while minimizing environmental impacts from their practices.