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The complex of pyramids, platforms, and plazas at Caral is about how old:
Efficient Level
The optimal point of production or consumption, where resources are utilized in the most effective manner, minimizing waste and maximizing benefit.
Pollution
The contamination of the natural environment by substances or energies that cause adverse effects on living organisms and ecosystems.
Marginal Social Benefit
The increased benefit for the public from producing or consuming an extra unit of a good or service.
Marginal Social Benefit
The additional benefit to society as a whole from the consumption of one more unit of a good or service.
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