The 19th November is World Toilet Day, a day to raise awareness of the global sanitation challenge- one in three people on the planet do not have access to a hygienic toilet - and of how much there still is to do to ensure that approximately 2.5 billion of people around the globe gain access to improved sanitation. It's a day to break the silence and taboos around toilets and all things shit. But also a day to celebrate the good work that is being done and what has been achieved already. So we asked people around the world to tell us what experience, activity or event in the last year signals to them that progress is being made in the area of sanitation?