Watch Revenge of sand (2011) : Full Movie Online Free Mongolia is made up of 40% of the population of nomads who ride horses through vast grasslands. However, Mongolia's symbol of grasslands is rapidly disappearing. This is due to rapid desertification. The lake, which was 12 times the size of Yeouido, dried up completely in the 2000s, and only the bare bones of camels are piled up here and there.