Toch, South Sudan John Khong Joak, 62 years old, is fishing in the Sudd swamp to feed his family. -It is getting harder to fish because the sea tulips and algae is covering larger areas of the swamp. The fish is getting smaller and I don't get as many as before. Help us! We need help we are dying here, he said. This is the first time in his life that the whole river is covered. Many scientists say climate change is the reason. The giant marshes are classified as an area of significance for the entire planet's health. Here, the White Nile turns into a pioneer of islands, canals and marshlands.