(FILES) This file photograph taken on July 3, 2022, shows a UNESCO World Heritage sign of The Dolomites, near the Marmolada mountain and glacier, where the collapse of an ice serac killed six people. - UNESCO warned that a third of the world's glaciers, including Kilimanjaro, Yellowstone and Mont-Perdu will disappear near 2050,"whatever way the climate scenario develops", and called to "drastically reduce CO2 emissions" to conserve the other two thirds, as this spring's IPCC report says ice and snow melting is one of the ten major threats caused by climate change. (Photo by Pierre TEYSSOT / AFP)