The development of public transport, especially rail, made daily commuting from the suburbs possible and led to most of the more prosperous people in the inner city areas relocating. As a result, the inner city areas became increasingly poor and also relatively cheap to live in. This a very general, simplified answer.
I believe it was the unfortunately under-appreciated and eccentric Nikolai Tesla.
Technological change can impact cities by increasing efficiency in transportation, communication, and infrastructure. This can lead to economic growth, improved quality of life, and increased opportunities for businesses and residents. However, it can also contribute to issues such as gentrification, job displacement, and unequal access to technology.
Visible signs of change in cities include new construction projects, renovations of existing buildings, changes in transportation infrastructure, increased population density, and shifts in the types of businesses and services available. These changes can reflect economic growth, urban development, and evolving societal needs.
Louis Pasteur found the cause of infectious diseases. The surgeons exploited this theory through careful cleaning of hands and all their body before the surgery.
Physical changes due to the expansion of cities include increased urban sprawl, deforestation for construction, higher levels of air and water pollution, loss of green spaces, and increased traffic congestion. These changes can have negative impacts on the environment and human health.
Ghettos, the same as for any neighborhood that is segregated for ethnic or cultural reasons.
They regarded them as their own cities within cities.
Ghettos did not live anywhere, they where areas of cities that Jews where sent to. They where separate to the rest of the city and often were overcrowded and dirty
I believe the terms used were "slums" and "ghettos."
The Jewish ghettos in WWII, sometimes known as Jewish quarters were sections of cities which were segregated for Jews to live in. (These becoming the only places where Jews were alowed to live).
The ghettos.
At that time they were encouraged to move into the cities, but in particular they had to move to a region called 'General Government'.
Jewish Ghettos were run-down parts of major cities in which an excessive number of Jews would be packed into a very small, unsanitary space.
Ghettos preceded concentration camps. Concentration camps appeared during the Nazi era in Germany. Ghettos were present in the largest cities in Germany (and other large urban areas in other countries) well before that.
The (Jewish) ghettos were sections of certain towns and cities which were segregated for the habitation of Jews.
The Jews were forced to live in the ghettos of the German-controlled cities. Please also see the related question below.
The Jews were forced to live in the ghettos of the German-controlled cities. Please also see the related question below.