How does the sea cleanse itself?

The sea cleanses itself through natural processes such as dilution, circulation, and biological activity. Ocean currents help distribute and dilute pollutants, while waves and tides facilitate the mixing of water layers. Additionally, microorganisms, such as bacteria and phytoplankton, play a vital role in breaking down organic matter and absorbing nutrients, effectively recycling materials and maintaining ecosystem balance. Collectively, these processes contribute to the ocean's ability to self-purify over time.