Answer : 1. "United Nations Convention to Combat Desertification (UNCCD)"
Explanation :

The United Nations Convention to Combat Desertification (UNCCD) report, “Global Land Outlook Thematic Report on Rangelands and Pastoralists” warns of the silent demise of rangelands, which cover half of the Earth’s land surface. These vital grasslands, which include prairies, shrublands and tundra, are being degraded by policies promoting conversion to cropland, urban expansion, overgrazing and overexploitation driven by growing demands for food, fibre and fuel.