Dr Jon Kellar is a professor at the South Dakota School of Mines and Technology. During his 30-year career in education, Dr Kellar has had a remarkable impact on undergraduate studies of the minerals industry, creating programs that integrate mineral processing, extractive metallurgy and physical metallurgy. He joins our host Thomas Hale to discuss innovations in his field, the challenges of building reliable and responsible mineral supply chains, and how we can develop new strategies to meet growing global demands for key metals.