How do you speak on behalf of a living legend like Berkeley Lab’s Art Rosenfeld, a particle physicist who attained international recognition as the “godfather of energy efficiency?” That was the challenge faced by Ashok Gadgil, Science and Technology Deputy for Berkeley Lab’s Energy Technologies Area, on September 25, 2016, in Taipei City, Taiwan. Last June, Rosenfeld was awarded the 2016 Tang prize in Sustainable Development for “his lifelong and pioneering innovations in energy efficiency resulting in immense reductions in energy consumption and greenhouse gas emissions around the world.” Winners received their award in Taipei where they were to present a laureate lecture. At the age of 90, Rosenfeld was too frail to make the trip and asked former grad student, longtime colleague, and close friend Gadgil to give the lecture in his place. After what Gadgil describes as “many hours of conversation with Art,” he delivered. More>