Sulfur dioxide (SO₂) is a greenhouse gas that cools the planet by reflecting solar radiation into space. This cooling effect stems from natural processes, such as volcanic eruptions and oceanic sulfur flux, where marine organisms like phytoplankton and corals play pivotal roles. However, climate change disrupts these processes. Rising ocean temperatures and acidification harm phytoplankton communities and corals, reducing sulfur emissions and diminishing the cooling effect. Innovations such as stratospheric aerosol injection aim to mimic volcanic eruptions by artificially dispersing aerosols for climate cooling. While promising, this strategy carries uncertain risks. Understanding the interplay between sulfur emissions, marine ecosystems, and climate interventions highlights the intricate balance of natural and artificial processes in mitigating global warming.