You walk along the coast every day, relax by the sea, take a swim, and then one morning you find the water has turned brown. What do you feel? I was frightened. I felt the reality of global warming to my bones. The Sea of Marmara is an important region of Turkey, with many large cities on its shores. Because of global warming, a blanket of a mucus-like substance in the Marmara Sea is increasing day by day, threatening the fishing industry and the environment. According to media reports, a layer of so-called sea snot, (marine mucilage) formed as a result of the proliferation of microalgae called phytoplankton in the sea, has reached water levels as deep as 30 meters below the surface in some parts of the Marmara Sea. The main reason for this is that the water temperature in the Marmara Sea is 2.5 degrees higher than average levels over the last 40 years.