On the Italian side, dividing lines of rivers or lakes are associated with glacier crests. However, with global warming, several of them are melting and disrupting the balance established for centuries. The route is thus modified in the region of Tête Grise / Plateau Rosa, Carrel cabin and Dos de Rollin. A joint Italian-Swiss commission agreed, in May 2023, on a project respecting the interests of both parties.
In 2023, specifies the BBC, the annual report of the Swiss glacier observation network Glamos indicated that Swiss glaciers had lost 4% of their volume during the year. It was then the biggest loss ever recorded after 2022 and its 6% less volume.
Cross-border tram and rivers
On the French side, it is the work of the Geneva tram which is forcing the Swiss government to modify the border. The line concerned connects the municipalities of Perly-Certoux, in Switzerland, and Saint-Julien-en-Genevois, in France. The two States will “exchange equivalent areas” to ratify the operation.
