How often can cork oak trees be harvested for their bark without harming the tree?

Cork is a remarkable natural material used in countless products, from wine stoppers to sustainable construction materials. Its harvesting and supply chain represent one of the most environmentally sustainable natural product cycles in the world. Test your knowledge about this fascinating industry that bridges natural resources and retail innovation.

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Every 9-12 years
Every 3-5 years
Only once in the tree's lifetime
Every 20-25 years