that year highincome countries had the highest material footprint per capita approximately metric tons per person per cent higher than the uppermiddleincome countries metric tons per person and more than times the level of lowincome countries metric tons per person the material footprint of highincome countries is greater than their domestic material consumption indicating that consumption in those countries relies on materials from other countries through international supply chains on a percapita basis highincome countries rely on metric tons of primary materials extracted elsewhere in the world