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Proven warld ile reserves, 2009

Petroleum (L. petroleum, frae Greek: πέτρα (rock) + Laitin: oleum (ile)[1][2][3]) is a naiturally occurrin, yellae-tae-black liquid foond in geologic formations beneath the Yird's surface, which is commonly refined intae various types o fuels. It consists o hydrocarbons o various molecular wichts an ither liquid organic compoonds.[4]


  1. "Petroleum". Concise Oxford English Dictionary
  2. The Laitin wird petra is a loanword frae Greek πέτρα.
  3. "Gasoline as Fuel – History of Word Gasoline – Gasoline and Petroleum Origins". 2013-07-12. Retrieved 2013-08-27. 
  4. EIA Energy Kids - Oil (petroleum). Retrieved on 2013-11-26.