Oceans act as the planet’s natural climate regulators by absorbing heat and carbon dioxide from the atmosphere. They store and transport energy across the globe through currents, influencing weather patterns and stabilizing temperatures. For example, the Gulf Stream carries warm water from the tropics to the North Atlantic, affecting regional climates. Oceans also play a critical role in the carbon cycle by absorbing large amounts of CO₂, helping mitigate greenhouse gas effects. However, excessive warming and acidification threaten marine ecosystems, reduce the ocean’s carbon absorption capacity, and amplify climate impacts like sea-level rise and extreme storms.