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Drilling

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[[File:Petroleum_city.jpg|400px|thumb|right|Petroleum City]]

Cities specialized in ~~Petroleum~~ Drilling extract and process [[oil]] for profit.

*Natural resources such as [[ore]], [[coal ]] and oil are finite in a region ~~are finite~~.

*~~Make~~ Be sure to inspect the region to find where the oil deposits are before you claim your city.

~~Petroleum~~ Oil extracted from the ground can be processed into more valuable resourcessuch as [[fuel]] and [[plastic]].

*A [[#Oil Refinery|refinery ]] can be built to convert petroleum into fuel and plastic.

Drilling also known as Petroleum is one of the [[big businesses|big business]] specializations. It has it own global [[leaderboard]].

==Petroleum Structures==

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