dazzling ice against a brilliant blue sky dani arnold and his friend are extreme mountaineers here on a quest for the ultimate trail. they're climbing that pits pollute a nearly 4000 meter peak. on select and pick your ice axes in the wind you hear the tension of it crests and hisses when it breaks up the ice blocks it's really cool he says and make a cool. but an increasing number of scientists so warning that such adventures might soon become impossible global warming is melting big lazio's down the arnold can see for himself the effects of climate change easy on the days when you could really go climbing in winter in the clip them called 10 years ago he thought there were lots more of them feel he made it all see it's. experts say we're at a turning point there's less snow less ice and glaciers are retreating. it won't be long before the alps as we know them no longer exist. i've . stagings teeth. in spring 28 team the mood in a glazier 3000 ski resort in switzerland was euphoric even among scientists a team led by glazier experts. from the swiss federal institute of technology in