People walk on footbridges as they visit “La Grotte de Glace” (Ice cave) on July 19, 2019 on the largest French glacier, “Mer de Glace” (Sea of Ice), in Chamonix-Mont-Blanc, in the French Alps, eastern France. At 7km long and 200 metres deep, the “Mer de Glace” (Sea of Ice) glacier, which is located on the northern slopes of the Mont Blanc massif, is France's largest glacier. (Photo by Philippe Desmazes/AFP Photo)
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