It's actually Dutch nuclear waste that will be brought to a nuclear reprocessing plant in France. The nuclear waste is transported by train, and will pass through a number of Flemish municipalities and cities like Antwerpen, Mechelen, Ghent and Kortrijk.
According to Greenpeace, the nuclear waste is highly radioactive. "If an accident should happen and the nuclear waste is exposed, this would lead to as much contamination as in Chernobyl", Greenpeace claims. "In other words, if an accident happens in an urban area, then we have a huge problem."
The mayors ask to have the permission for the transport suspended. They also want more details about the transport, in order to be able to react adequately if something should go wrong.