The grisly discovery of a disembodied foot on a NSW beach was a tragic twist in the mystery of missing woman Melissa Caddick. Such tragedies can also reveal hidden currents connecting the planet.
Almost 30 years ago the world responded to the realisation that our ozone layer was in trouble. But an alarming recent development shows there is no room for complacency, write Shane Keating and Darry Waugh.