There’s nothing like scrambling along a jagged granite ridge resplendent in russet and lime-green lichen, when it should be covered in snow, to remind you that the climate crisis is in full swing. My guide, Maxant Danilo, and I are at an altitude of more than 2,500 metres in the Hautes-Alpes, but even though it’s late January, conditions on south-facing slopes such as these feel more like late spring. Our snowboards are strapped to our backpacks instead of our feet.