As we drove around Portugal I was fascinated by the cork oak trees that we occasionaly came across. These trees are native to the Mediterranean where they occur in open woodlands and on small hills. They have a thick dead outer bark that can be harvested roughly every 10 years, leaving the inner bark healthy and able to regenerate several other layers of the cork bark over the typical 150-year lifespan of the tree. Used mainly in the production of corks for wine bottles, but also for engine gaskets and home insulation, cork oaks are grown commercially in a number of places, but nowhere nearly as successful as in Portugal - the world's largest producer of cork products. During our earlier travels, I had seen a few groves where the outer bark had been stripped, leaving a very dark inner bark on the trunk. However, just as we were starting the climb to Monsanto, in the tiny hamlet of Relva, we came across this scene of obviously very freshly harvested trees. On our first day's drive out from Lisbon we had met, on a back road part way to the Algarve, a truck loaded down with strange curved sections of something. It was only later that we realized that these were chunks of the spongy cork bark that had been cut off the trees.
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