A nation's productive footprint is the sum of the Footprints for all of the resources harvested and all of the waste generated within the defined geographical region. This includes all the area within a country necessary for supporting the actual harvest of primary products (cropland, pasture land, forestland, and fishing grounds), the country’s built-up area (roads, factories, cities), and the area needed to absorb all fossil fuel carbon emissions generated within the country. If a country grows a crop for export, it is included in the ecological footprint of production of this country and the ecological footprint of consumption of the importing country. The indicator is measured in global hectares (gha).