Glacial retreat refers to the process where glaciers lose mass and shrink in size over time. This phenomenon occurs when the rate of melting and sublimation exceeds the accumulation of snow and ice. Factors contributing to glacial retreat include rising global temperatures, changes in precipitation patterns, and natural climate variability. As glaciers retreat, they can significantly impact the surrounding environment. For instance, the melting ice contributes to rising sea levels, which can affect coastal communities. Additionally, the retreat of glaciers can alter local ecosystems and water supplies, as many rivers and lakes depend on glacial meltwater for their flow, especially during warmer months.