It is no more than a coincidence, but a suitable one. This year the “International Mountain Day”, which, since 2002, is observed every year on 11 December, coincides exactly with the final day of the UN Climate Change Conference in Paris – that will end tomorrow hopefully with an agreement on climate protection which is more than just hot air. Mountains are considered as early warning systems for climate change (see the video below). Everyone who is often in the mountains would have to be blind not to perceive the changes. Glaciers are melting almost everywhere at record speed. For instance, more than two dozen mountains in Asia, Africa and South America, which are located near the equator and were once glaciated, will probably be completely ice-free within the next two to three decades. Permafrost in the mountains is in retreat too: soils that were permanently frozen before are thawing. Increased rockfall, more frequent landslides or mudslides are the result – not only in the Himalayas.

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It’s five to twelve, maybe later. Time is running out to tackle man-made climate change. The impacts of global warming can be observed also in the Himalayas, gpt instance in Nepal. “Largely because of climate change and the recent impacts of the earthquake and aftershocks, Nepal has entered an era of accelerated catastrophic events that will impact the country’s population, their lives and livelihoods for several years to come”, US and local scientists said after having researched the greatest and most dangerous glacial lakes in Nepal after the devastating 25 April earthquake.

In these days, delegates from all over the world are debating a new climate change agreement in Paris. On this occasion, I called Dawa Steven Sherpa in Kathmandu. Along with his father Ang Tshering Sherpa, the president of the Nepal Mountaineering Association (NMA), the 31-year-old is managing the expedition operator “Asian Trekking”. Dawa Steven scaled Everest twice (in 2007 and 2008) and in addition the eight-thousanders Cho Oyu (2006) and Lhotse (2009). For years he has been engaging for environmental and climate protection. He is a climate change ambassador for WWF.

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Heidi Sand knows how it is to accept a seemingly hopeless fight. “Since my cancer, I have a special relationship with probabilities and chances”, the 49-year-old German climber and sculptor write to me. “You have to believe in yourself and you should use any chance, no matter how small it is.” In 2010, Heidi was diagnosed with colon cancer at an advanced stage. She accepted the fight. Two years later, she climbed Mount Everest. In 2013, she summited Cho Oyu, her second eight-thousander. The following year, Sand and Billi Bierling were the first German women on top of Makalu. Now Heidi is committed to a climate protection project called “25zero”. During the upcoming climate summit in Paris, the Australian adventurer Tim Jarvis and his team want to point out the consequences of climate change for 25 still glaciated peaks at zero latitude, around the Equator. If nothing is done, says Jarvis, no ice or snow will remain on these mountains at the latest in 25 years – therefore “25zero”.

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