I'm in Canada at the School of Environment, Enterprise and Development (SEED) at University of Waterloo. My expertise is originally in life-cycle assessment (LCA) and industrial ecology approaches to industrial materials, for example in electric vehicles and automotive recycling. In recent years, I have started to look more at supply-chains of critical materials -- especially the so-called "conflict minerals" (Sn, Ta, W, Au). I am interested in society's sustainable access to critical raw materials. Approaches I use include those from industrial ecology (materials flow analysis, LCA) and business scholarship (surveys and statistical analysis). I believe standards, certification and auditing approaches can play a vital role.