Effects from World War I no man's lands persist today, for example at Verdun in France, where the "Zone Rouge" (Red Zone) contains unexploded ordnance, and is poisoned beyond habitation by arsenic, chlorine, and phosgene. The zone is sealed off completely and still deemed too dangerous for civilians to return: "The area is still considered to be very poisoned, so the French government planted an enormous forest of black pines, like a living sarcophagus", comments Alasdair Pinkerton, a researcher at Royal Holloway University of London, who compared the zone to the nuclear disaster site at Chernobyl, similarly encased in a "concrete sarcophagus".