The statement by Kyeongjae Cho that “we don’t have enough platinum” for a hydrogen economy based on fuel cells is simply wrong. Anyone who is working in the fuel cell industry expects the amount of platinum used in fuel cells to drop by the time this technology will be available for a mass market. If future cars are using platinum-based fuel cells, they won’t need today’s catalytic converters, which also use a fair amount of the precious metal.

Stefan Geiger
London, England