Italy and Switzerland have been forced to redraw their border in the Alps due to melting glaciers caused by climate change. The Swiss-Italian border that runs in the shadow of the Matterhorn has usually been determined by natural boundaries created by glacier ridgelines or areas of perpetual snow.

Part of the border will be redrawn because of the glacial melt, in another sign of how much humans are changing the world by burning planet-heating fossil fuels.

Global warming is causing all Alpine glaciers to recede, affecting natural boundaries and changing mountain routes.