As well as being a popular holiday destination, the Alps are an important store of drinking water. But they are threatened by tourism and climate change. How can we better protect our mountains? An Austrian initiative at the Katschberg pass is trying to reconcile climate protection and tourism. In Belgium, efforts are under way to develop sustainable skis that leave only an imprint in the snow, with no trace of wax or microplastics. Elsewhere, “ice stupas” are created to store water for the summer.