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Italy and Switzerland have agreed to shift their shared border in the Alps. Here's why

The Matterhorn mountain looms above the valley that includes the village of Zermatt on January 7, 2022 near Zermatt, Switzerland. (Sean Gallup / Getty Images via CNN Newsource) The Matterhorn mountain looms above the valley that includes the village of Zermatt on January 7, 2022 near Zermatt, Switzerland. (Sean Gallup / Getty Images via CNN Newsource)
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Part of the border between Italy and Switzerland is set to be redrawn as the glaciers that mark the boundary melt, in yet another sign of how much humans are changing the world by burning planet-heating fossil fuels.

The two countries have agreed to change the border under the iconic Matterhorn Peak, one of the highest summits in the Alps, which overlooks Zermatt, a popular skiing destination.

While national boundaries are often thought of as fixed, large sections of the Swiss-Italian border are defined by glaciers and snow fields. 鈥淲ith the melting of the glaciers, these natural elements evolve and redefine the national border,鈥 the Swiss government said in a statement Friday.

The border changes were agreed back in 2023 and the Swiss government officially approved the adjustment on Friday. The process for approval is underway in Italy. As soon as both parties have signed, the agreement will be published and details of the new border made public, according to the Swiss government.

Europe is the world鈥檚 fastest-warming continent and the impact on its glaciers has been stark.

In Switzerland, they are melting at an alarming rate. The country鈥檚 glaciers lost 4 per cent of their volume last year, second only to the record-setting 6 per cent lost in 2022.

This downward trend shows no sign of ending, said Matthias Huss, a glaciologist at the Swiss university ETH Z眉rich and director of GLAMOS, the Swiss glacier monitoring network.

鈥淚n 2024, glaciers continued to lose ice at a high speed despite much snow in winter that was expected to bring some relief,鈥 he told CNN. 鈥淪ome glaciers are literally falling apart, small glaciers are disappearing.鈥

Even with the most ambitious climate action, up to half the world鈥檚 glaciers may be gone by 2100. It鈥檚 causing a cascade of impacts.

It makes the landscape more unstable, prone to dangerous landslides and collapses. In 2022, 11 people lost their lives when a glacier collapsed in the Italian Alps.

Shrinking glaciers are leading to grim discoveries. Last year, the remains of a mountain climber who had gone missing 37 years earlier while hiking near the Matterhorn were recovered.

As they recede, glaciers are also losing their vital role in contributing freshwater, which could aggravate shortages during heat waves.

The shifting of national borders 鈥渋s one small side-effect鈥 of glaciers melting, Huss said. But when people can see it 鈥渄irectly affects our world map,鈥 he added, it makes the immense changes of a warming world much more visible.

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