UNESCO World Heritage sites contain 20% of known species
The 1,157 protected sites account for less than 1% of Earth's surface but play vital roles as biodiversity hotspots.
World Heritage Convention 1975
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Odesa historic center added to UNESCO's World Heritage List
The listing means 194 nations that are party to the 1975 World Heritage Convention must commit to not deliberately cause direct or indirect damage to Odesa, and to help protect it.