Anyone who has been anywhere near Materials UK over the last year will know that I am a big fan of the work of Tom Graedel. I first met him at an American Chemical Society meeting in Washington several years back. His down to earth approach and rigour of analysis made a large impression on me. The basic idea of his analysis is to map the flows or a particular material and work out where it goes and how much is “working capital” in the system.   more »