The economy of Saskatoon has been associated with potash, oil and agriculture resulting in the moniker POW. Saskatoon's other nickname, the "Hub City," refers its ideal central location for distribution and logistics. Various grains, livestock, oil and gas, potash, uranium, wood and their spin off industries fuel the economy. The world's largest publicly traded uranium company, Cameco, and the world's largest potash producer, Nutrien, have corporate headquarters in Saskatoon. Nearly two-thirds of the world's recoverable potash reserves are located in the Saskatoon region.