This document defines key terms related to the geography of production and consumption: Producers are workers who make goods for others to purchase, through agriculture, manufacturing, or services. Consumers purchase and enjoy commodities like manufactured goods or food, and this can also include media, art, leisure activities, and professional services. Food miles measure how far food travels to reach consumers, with most supermarket food coming from distant locations. Carbon footprint is a measure of carbon dioxide used in transporting products, and consuming goods with high carbon footprints is worse for the environment due to climate change.