UNESCO(@UNESCO):Did you know that caves and karst landscapes provide drinking water for more than 1 billion people worldwide? 💧 On the first International Day of Caves and Karst, we spotlight these vital environments for biodiversity, freshwater and our planet’s heritage.

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가입 February 2009

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UNESCO@UNESCO

2026.09.13 04:00

Did you know that caves and karst landscapes provide drinking water for more than 1 billion people worldwide? 💧 On the first International Day of Caves and Karst, we spotlight these vital environments for biodiversity, freshwater and our planet’s heritage.