Watch HDToday. An eye-opening investigation into the knock-on effect of single use plastic and how human habits are destroying the worlds longest river, the Nile in Egypt. As part of Sky Ocean Rescue, and presented by Alex Crawford, The Plastic Nile investigates the dire effects of plastic pollution on the world’s longest river, the Nile. The river is a crucial life source for millions of people who depend on it for food and livelihoods. Starting right from the source, Sky News' documentary for the Sky Documentaries channel can reveal the extent of the pollution in the river that runs through five countries.