Another thing about the Canal du Midi is that the plane trees that are so typical and give welcome shade in the Toulous-Sète portion are going to have to gradually chopped down because a fungal rot makes them dangerous. So it will take years for new trees to grow to give shade.

Not so in the portion from Toulouse to the Atlantic. The reason is said to be that the spores are transported by the boats, and there are so many more of them in the Mediterranean section...