Uro is a currency pegged to the value of 1 metric tonne of Urea, the world's most important fertilizer responsible for over half of total world food production by volume. Urea is an excellent option to peg a long term currency against because it cleanly tracks the gradual increase of energy and food prices. Urea is made from only energy, water and air - and its demand is based on the ever increasing need for food. An international group of Urea sellers have joined the Uro Foundation to form a legal consensus, the Uro Protocol. The Uro Protocol sets out clear procedures for the exchange of Urocoins for Urea shipments at the pegged ratio. The protocol has been ratified by several Urea suppliers and is open to signing by any Urea seller.