I am pleased and honored to have been invited to give the 2015 Lawrence Badash Memorial Lecture in the History of Science at the University of California Santa Barbara. I will be speaking on my recent work on the environmental history of computing. The title of the talk is The Materiality of the Virtual: A Global Environmental History of Computing from Babbage to Bitcoin. If you happen to be in Santa Barbara on January 21, 2015, please join me there!