Non-fictionThese failures of clean-­up, or ‘mining legacies’, are the result of booms and busts – of minerals drifting in and out of favour. Nothing is as precious as a hole in the ground – until that hole in the ground is worth less than nothing. When a boom ends and a resource’s price plummets, a quarry’s metamorphosis from asset to liability can take place in an instant. When abandoned mines are located in out-of-­the-­way places, populated by those with little political influence, tailings may simply be left to blow in the wind.