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Which fossil fuel is the world's most abundant?
Exchange
The act of giving one item in return for another, often seen in finance and trade as the swapping of goods, services, or financial instruments.
Trade
The exchange of goods, services, or both between two or more parties, either across international borders or within a single market.
Value
The importance, worth, or usefulness of something, often in economic terms as perceived by the consumer.
Production
The process of creating goods and services through the combination of labor, capital, and resources.
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