Switzerland and Italy have redrawn part of their border in the Alps due to melting glaciers, caused by climate change, BBC reports.
Part of the area affected will be beneath the Matterhorn, one of Europe's tallest mountains, and close to a number of popular ski resorts.
Large sections of the Swiss-Italian border are determined by glacier ridgelines or areas of perpetual snow, but melting glaciers have caused these natural boundaries to shift, leading to both countries seeking to rectify the border.
Switzerland officially approved the agreement on the change on Friday, but Italy is yet to do the same. This follows a draft agreement by a joint Swiss-Italian commission back in May 2023.
Statistics published last September showed that Switzerland's glaciers lost 4% of their volume in 2023, the second biggest loss ever after 2022's record melt of 6%.
An annual report is issued each year by the Swiss Glacier Monitoring Network (Glamos), which attributed the record losses to consecutive very warm summers, and 2022 winter's very low snowfall. Researchers say that if these weather patterns continue, the thaw will only accelerate.
On Friday, Switzerland said that the redefined borders had been drawn up in accordance with the economic interests of both parties.