Mesopotamia Economics

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Across
  1. 2. Exchange of goods or services
  2. 4. Main source of food supported by the fertile land
  3. 7. Streams of water used for trade and fishing
  4. 8. Land capable of yielding crops
  5. 10. Mesopotamia's most popular trade item
Down
  1. 1. The earliest form of trade
  2. 3. More than needed
  3. 5. Tax on imports and exports
  4. 6. Common issue leading to slavery
  5. 9. Technique used to boost agriculture