Friedrich Nietzsche would have been intrigued by the current anxiety over the planet’s atmosphere. For the German philosopher was also an obsessive weather-watcher and climate-worrier. A disciple of what was known as “medical climatology” and “climato-therapy”, he travelled Europe searching for the perfect environment. When his ill-health made teaching impossible in 1879, he became as preoccupied with matters meteorological as many are today. “Where,” he despaired on June 23, 1881, “is the land with plenty of shade, eternally clear sky, an equally strong sea breeze from morning to evening, without changes in the weather? It is there, there that I…