If you want a fuel cell, you need platinum, is one of the multiplicity of points Bernstein investment company makes in a major work just released which shows growing and ongoing demand for platinum group metals (PGMs) and provides ample reason why metals and mining matter more than ever. In the 413-page work, which provides core lessons and a 50-year bullish forecast, analysts Bob Brackett and Danielle Chigumira, with contribution from Vijay Bhasin, find that every 1% growth in gross domestic product, mined volumes should increase by 2%.