Land subsidence is the gradual sinking or settling of the Earth's surface. This phenomenon can occur due to various factors, including the extraction of groundwater, oil, or natural gas, which can create voids underground. When these resources are removed, the ground above may collapse, leading to a decrease in elevation. Another cause of land subsidence is the natural compaction of soil and sediment over time. This can happen in areas with heavy rainfall or where the soil is saturated. Additionally, human activities, such as construction and mining, can also contribute to this issue, affecting infrastructure and ecosystems in regions like California and Florida.