Which ancient civilization implemented the first known systematic retail product recycling program, where merchants were required to accept used pottery and metalware for repair or material reclamation?

While modern retailers focus on sustainability as a new frontier, ancient civilizations had their own ingenious sustainable retail practices. Their methods of product distribution, resource conservation, and waste reduction were often remarkably advanced. This poll explores how ancient peoples implemented sustainable retail practices that modern businesses are only now rediscovering. Test your knowledge about these fascinating early sustainable commerce solutions!

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Roman Empire (under Emperor Vespasian's commerce reforms)
Song Dynasty China (under their 'circular commerce' policies)
Ancient Egypt (as part of their temple-based commerce system)
Phoenician trading networks (in their coastal market regulations)