The document discusses natural resources and land use in urban and rural areas. It defines natural resources as those that exist undisturbed by humanity in nature. Land resources include agricultural land, underground water, and raw materials that allow for industrialization. The rural-urban fringe is where urban and rural areas mix. The document also lists causes of land degradation like soil erosion, loss of fertility, and overuse of irrigation. Ways to protect against degradation include afforestation, conservation tillage, and reducing industrial waste. Failing to protect land can lead to loss of soil nutrients, less vegetation, pollution of water sources, and changes in climate.