The government of the waters and natural environment in the metropolitan area of the Lagoon of Venice from past to future

The Venice problems are not just about protection against flooding. And the Laguna problems are not only those of defense from the rivers that fill with sediment making it disappear. Of these two problems we talked a lot. Today we can say that, like yesterday, the city's problems and the problems of the Lagoon are intertwined. The city presents problems of depopulation, economic base and transport. In Laguna there are environmental problems, archaeological, eustatism and bradyseism. Laguna and city, also as metropolitan area, represent a unified whole, inseparable. The paper describes the main problems of bradyseism, of eustatism, of high tides that flood the ancient centers (acqua alta) and speaks of the defense of the city from them. But there are also basic economics problems, for the life of the settlements and transport, required to give a reason for living the city, almost as much reason for living for the city is Laguna itself. It's also stressed the importance of integrating these issues with those of the tourist economy, the natural environment, the economy and the harbor, describing some solutions into a systemic vision, because Venice and the Lagoon are inseparable and can not work one without the other.