“Every time I go back, I remember how it used to be.” In 2024, glaciers outside the giant ice sheets of Greenland and Antarctica lost 450 billion tonnes of ice, according to a recent World Meteorological Organization report. That’s equivalent to a block of ice 7km (4.3 miles) tall, 7km wide and 7km deep - enough water to fill 180 million Olympic swimming pools. “Glaciers are melting everywhere in the world,” says Prof Ben Marzeion of the Institute of Geography at the University of Bremen. “They are sitting in a climate that is very hostile to them now because of global warming.” The Clariden Glacier, in north-eastern Switzerland, was roughly in balance until the late 20th Century - gaining about as much ice through snowfall as it lost to melting. But this century, it’s melted rapidly. And the largest glacier in the Alps, the Great Aletsch, has receded by about 2.3km (1.4 miles) over the past 75 years. Where there was ice, there are now trees. Tap the link in BBCNews’s bio to fin...