Dunkerque, a French coastal town, celebrates 400 years of the French Navy with a sea festival. This celebration is an opportunity for the residents to come together and celebrate the history of the French Navy. However, pollution in the North Sea is a major concern for the residents of Dunkerque. Plastic waste, oil spills and other pollutants have a negative impact on the marine environment and the ecosystems that live there. Local authorities and environmental organizations are working together to reduce pollution and protect the marine environment. The sea festival in Dunkerque is an opportunity for the residents to come together and celebrate the history of the French Navy, but also to raise awareness about the importance of protecting the marine environment.