The importance of the sociological aspects of new challenges and crises, such as land subsidence, in the world, especially in developing countries, was emphasized by Dr. Niroumand in Europe. He noted that land subsidence is not only a national crisis, as in the case of Iran, but also an international crisis affecting historical buildings and world heritage, since it has the potential to cause widespread destruction in the future. Heritage and historical buildings represent the history of all countries and of humanity as a whole. If they are damaged in any country, part of the shared history of the world is lost. Based on this, Dr. Niroumand emphasized that land subsidence is an international crisis for historical buildings and cultural heritage, and that it requires international action.