Many millions of tonnes of televisions, phones and other electronic equipment are discarded each year, despite them being a rich source of metals. But now e-waste mining has the potential to become big business. Professor Veena Sahajwalla's mine in Australia produces gold, silver and copper - and there isn't a pick-axe in sight. Her "urban mine" at the University of New South Wales (UNSW) is extracting these materials not from rock, but from electronic gadgets....read more >>