Soil properties and soil biodiversity play significant roles in land degradation, especially in arid regions. Today is the UN World Soil Day (WSD) 2025 themed "Healthy Soils for Healthy Cities”. As an urban farmer and a USEPA recognized Qualify Water Efficient Landscaper (QWEL) working at the Arcadia Ecohome’s micro-agroforest, a Certified Bee Friendly Farm and a listed Climate Victory Garden, located in the arid Southern California, I’ve registered a local event with FAO to support the global celebrations of WSD. Our key actions taken today is focused on improving soil properties and biodiversity to combat land degradation with actions to add organic matters from fallen leaves, tree trimmings & food wastes to the forest floor through composting so as to enhance the soil sponge’s functions of taking and keeping moisture from cool night dews, to harbor a bio-diversified forest-floor inhabitants such as insects, earthworms & microbes who contribute to build healthy soils, to induce root growth for reducing soil erosion, and to minimize green & food wastes generated in urban areas to be hauled to remote desert landfills. The photo (sorry, cannot be uploaded) taken today shows sheet composting of fallen leaves all over the forest floor, pile composting of twigs & branches by tree roots and an in-ground composting of kitchen wastes, all for building healthy soils by nature-based solutions. I’m sharing what we do at CIEDM with our networks, especially my follow members in the United Nations Convention to Combat Desertification (UNCCD) Communities of Learning and Practice, as part of our grassroots actions in social media campaign for WSD.