Examlex
What role did metals play in Prehistoric times? Why has iron been called one of history's "key metals"?
Electricity Generation
The process of producing electrical power through various means such as thermal, hydroelectric, nuclear, solar, and wind energy.
Petroleum
A naturally occurring, yellowish-black liquid found in geological formations beneath the Earth's surface, used primarily as a fuel source.
Per Capita Water Use
The average amount of water used per person within a specific population or area over a certain time frame.
Renewable Energy Sources
Energy sources that are replenished naturally, such as solar, wind, hydro, and geothermal power.
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