Identify the Following

question 34

Essay

Identify the following. Be as specific as possible, and include names, dates, and relevant facts as appropriate. Be sure to explain the significance of the person or term.
-Chiefdoms

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Definitions:

Coal

A combustible black or brownish-black sedimentary rock used primarily as a source of energy.

Aquifers

Underground layers of water-bearing permeable rock, rock fractures, or unconsolidated materials from which groundwater can be extracted using wells.

Alternative Fuels

Fuels other than the traditional choices (like petroleum), including renewable sources like biofuel, electricity, hydrogen, and others, aimed at reducing pollution and dependency on fossil fuels.

Oil Exploration

The process of searching for oil and gas reserves underground or underwater.