A certification scheme won't work – data should move through the supply chain as efficiently as the goods themselves How did the everyday things that we buy get here, and from where? It seems a simple enough question and yet for the vast majority of things we buy it is completely unanswerable. The label may say "made in China", but normally that's just where the bits and pieces were put together. So where do the bits come from, and how do we find out? Why should we care? The total val...