The document discusses the case study of Surfers Against Sewage (SAS), a organization that aims to raise global awareness of pollution in seas. SAS creates posters with graphic images of polluted waters to depict how surfers feel and raise awareness. They focus on different types of pollution through campaigns covering marine litter, water quality, and climate change. SAS has been successful in their mission, organizing over 1,000 beach cleanups removing 564 tons of litter in 2016 alone through community involvement.