I grew up in the Risle Valley, that is pictured in the video. I can confirm that we have the same geology. For only a few years, the river is disappearing every

I grew up in the Risle Valley, that is pictured in the video. I can confirm that we have the same geology. For only a few years, the river is disappearing every summer, which sounds surprising in a global warming context. But no big deal here, just geology.