| Pakistan's principal natural resources are arable land, water, and extensive natural gas and oil reserves. About 28% of Pakistan's total land area is under cultivation and is watered by one of the largest irrigation systems in the world. The most important crops are cotton, wheat, rice, sugarcane, maize, sorghum, millets, pulses, oil seeds, barley, fish, fruits and vegetables, which together account for more than 75% of the value of total crop output. Pakistan also exports wood, cement, tiles, marbles, cotton textiles, leather goods, sports goods, surgical instruments, electrical appliances, carpets, rugs, and hides & skins. The Salt Range in Punjab Province has large deposits of pure salt. Pakistan has extensive energy resources, including fairly sizable natural gas reserves, oil reserves, coal, gypsum, limestone, chromites, iron ore, rock salt, silver, gold, precious stones, gems, marbles, tiles, copper, sulfur, fire clay, silica sand, and large hydropower potential. However, the exploitation of energy resources has been slow due to a shortage of capital and domestic and international political constraints.
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