One of the poorest countries in the world, Niger's economy is based largely on subsistence crops, livestock, and some of the world's largest uranium deposits. The industrial activities of Niger center on the production of uranium, of which Niger is world's largest producer. Among other industries in Niger, production of foodstuffs, chemicals, textiles and apparels, agricultural machinery, small-scale handicrafts and metal furniture are worth mentioning. The GDP contribution from Niger industrial sector is around 18%. Foreign trade is yet another important aspect of Niger economy. Cotton garments, onions and cowpeas form the chief exports of the nation, while food and industrial products, petroleum and consumer goods are its principal imports.