Glacial retreat refers to the process where glaciers lose mass and shrink in size due to melting and sublimation. This phenomenon is primarily driven by rising global temperatures, which can be linked to climate change. As temperatures increase, the ice at the glacier's surface melts faster than it can be replenished by snowfall. The retreat of glaciers has significant environmental impacts, including rising sea levels and changes in local ecosystems. Many glaciers around the world, such as those in the Himalayas and Alps, are retreating at alarming rates, affecting water supply for millions and altering habitats for various species.