Did you know the atmospheric layer that shields us can also clean dirty water ? Meet 3 MegaKennies. Scientists who know about ozone and how to use it.  Australia's largest music festival site produces a Megalitre of waste per day for a few weeks each year. They have a plant that ticks all the environmental boxes. Dr Jake O'Brien, Ben Kele and Guy Scott explain.   https://researchers.uq.edu.au/researcher/16984