One is called "the English snail", the other "the Marseille boar". Together, they are walking from Marseille to Paris, collecting thousands of discarded facemasks along the way, as well as plastic bottles and fast food waste. Setting off on October 1st, they walk as close as possible to the TGV line, bringing their mission to the people they meet along the way and even staying with them sometimes, when they are not camping in the woods or in a car park. The duo should arrive this Saturday in Paris after having walked 880 km.