Gold costs were about $317 per troy ounce in 2007, but these can vary widely depending on mining type and ore quality; global mine production amounted to 2,471.1 tonnes. After initial production, gold is often subsequently refined industrially by the Wohlwill process which is based on electrolysis or by the Miller process, that is chlorination in the melt. The Wohlwill process results in higher purity, but is more complex and is only applied in small-scale installations. Other methods of assaying and purifying smaller amounts of gold include parting and inquartation as well as cupellation, or refining methods based on the dissolution
Dumb Ways to Die Ways To Die" will." McCann estimated that within two weeks, it had generated at least $50 million worth of global media value in addition to more than 700 media stories, for "a fraction of the cost of one TV ad". According to Metro Trains, the campaign contributed to a more than 30% reduction in "near-miss" accidents, from 13.29 near-misses per million kilometres in November 2011 – January 2012, to 9.17 near-misses per million kilometres in November 2012 – January 2013. The video was animated by Julian Frost and produced by Cinnamon Darvall. It was uploaded to YouTube on 14 November