2008 became the point of no return: for the first time in history there are more people living in cities than in rural areas. Over the years, cities are growing even larger due to climate change and to “environmental migrants”, who are destined to become the new humanitarian emergency of the planet in the next few decades. Environmental migrants are people who, escaping from environmental stresses don’t “land” in the richer nations, but look for new ways of livelihood in the urban areas of their home countries, which are already overcrowded and often extremely poor.