unbfacts: In the 1830s, the Swedish Navy planted 300,000 oak…

By | August 6, 2025

unbfacts:

In the 1830s, the Swedish Navy planted 300,000 oak trees on Visingsö island to supply future warship timber. By the time the trees matured around 1975, ships were built of steel and iron, so the Navy never harvested them.

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