Aquatic ecosystems play a significant role in climate regulation by acting as carbon sinks, absorbing CO2 from the atmosphere. Oceans, wetlands, and lakes sequester large amounts of carbon and help mitigate climate change. Additionally, these ecosystems influence regional and global temperature patterns and weather systems through heat exchange and evaporation. Aquatic plants and organisms also produce oxygen, contributing to air quality. The health of aquatic ecosystems is crucial in maintaining biodiversity and supporting human livelihoods, making their conservation essential for climate stability.