This commemorative edition of CALIBRE journal's two years is more than a homage to a partner; it is a tribute to a great friend. Richard Cathcart is not only an excellent master; is a sower of ideas and knowledge that should inspire the next generations of geographers, environmental engineers, managers, environmentalists and all academic categories interested in the issues related to our permanence as a species. Scrolling through topics ranging from an inventory of declining water sources existing on the planet to the implementation of advanced technologies for desalination of seawater, my old friend offers us a collection of great topicality. Required reading for students, teachers and researchers!
Nilo Serpa, Scientific Editor.
