The global conveyor belt is a large-scale ocean circulation system that moves water around the world's oceans. It is driven by differences in temperature and salinity, which affect water density. This circulation helps regulate climate by distributing heat from the equator to the poles. As warm water flows from the equator toward the poles, it cools and becomes denser, eventually sinking. This cold water then travels back toward the equator at deeper ocean levels. The global conveyor belt plays a crucial role in maintaining the Earth's climate and supporting marine ecosystems, influencing weather patterns and nutrient distribution in the oceans.