From our German friend, Jörg Zimmermann a reminder that good planning requires good scientists and good politicians:  Global warming is harder and harder to deny. Plots of global temperature are clearly moving upward. The Arctic sea ice melt reached a new record low this year, which definitively confirmed what we suspected in 2007, that the Arctic has entered a new climatic regime. Thus, we are now more and more concerned about the impact that global warming will have. One of the most discussed topics this year in Germany was how city dwellers will deal with increasingly common heat waves. But first I want to tell you a story of a professor, who pasted grains of sand on paper …