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Materials needed and valued by people, such as soils and forests, that can be replaced by Earth's natural processes.
Resources, such as coal and oil, that cannot be replaced by Earth's natural processes
A renewable energy resource produced from dams that harness the energy of falling water to power generators
An economic system in which people, not government, decide what to make, sell, or buy,
An economy in which the government owns most of the industries and makes most of the economic decisions
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