The story of thie paper commenced in early 2016. At that time Ms. Anna Bokowa contacted 4 authors with experience on odour management, to write a small summary of odour regulations in Australia, New Zealand, USA, Canada and a few countries of Europe. The Idea was to present this paper at a conference that she was organizing in Gdańsk, Poland. Soon these authors realized that the task was not minor and more European authors were added in order to have a more detailed picture of the odour regulations in this continent. This paper was presented in MKO2016, however, the authors agreed that a more overall view was needed. That is why authors from some other countries with relevant odour regulations in South America, and Asia were added.

   In total, 18 authors from Canada, Spain, USA, Poland, New Zealand, Austria, France, UK, Italy, Chile, Belgium, Colombia, China, Germany, the Netherlands and Japan have had over 50 (virtual) meetings at different daylight zones along 4 years of work. Many passionate discussions have been held along the years and many attempts have been made in order to homogenize the different views and stiles of the writing of the paper, (unsuccessfully, as pointed out by the reviewers ;-). Finally, the last draft was delivered, and now it is being reviews by experts. The preprint is available to everyone here.