Jordan's economic resource base centers on phosphates, potash, and their fertilizer derivatives; tourism; overseas remittances; and foreign aid. These are its principal sources of hard currency earnings. Lacking coal reserves, hydroelectric power, large tracts of forest or commercially viable oil deposits, Jordan relies on natural gas for 93% of its domestic energy needs. Jordan used to depend on Iraq for oil until the American-led 2003 invasion of Iraq. Jordan also has a plethora of industrial zones producing goods in the textile, aerospace, defense, ICT, pharmaceutical, and cosmetic sectors. Jordan is an emerging knowledge economy.