Where are the mountains of swarf, hundreds of thousands of tons of which have been produced in the city, over hundreds of years? The answer is that there are none. Sheffield's grinding industry is another example of the city's fine tradition of recycling. The swarf was collected, and the grit separated from the metal grindings. The grit was taken to Leeds where it was used in the production of industrial hand cleanser, hence the trade name 'Swarfega'. The metal grindings were taken to Huddersfield, to Standard, and Lion Fireworks, where they were employed in the making of sparklers! Just how many kids have wished and wondered as they celebrated their innocence, sparklers aloft, drawing on the heavens, magical roadmaps to the stars.