Energy density

One thing I often struggle to communicate in debates about renewable versus nuclear energy is the concept of energy density. Yesterday, at Tom Titt Experiment in Södertälje, I think I found the perfect illustration in the human-powered helicopter above.

Now, on the train back to Gothenburg, I am commenting on thesis drafts from my students, but I find myself distracted by the many moving tributes to Stina Oscarsson, one of the most important voices in the Swedish public debate, who went silent four days ago after a life-long struggle with anorexia. While I occasionally disagreed with some of the things she wrote or said, I always made time to read her texts when they appeared. I will dearly miss her perspective.