Stones for tool use are a ___________ resource because even though they are replenished naturally, the rates of replenishment are measured in millions of years.
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Q1: How can dams positively impact human populations
Q2: Do the same factors that limit natural
Q4: The science of _ emerged from the
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Q6: Some resources are renewed on such a
Q7: About 5% of the world's forests are
Q8: _ is generally the most economically efficient
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Q11: _ is the conscientious management of natural
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