Well no it is not possible to lead a city life would have been possible without the use of metals because we the people who live in the cities use a lot of metals in our day to day life like iron, aluminum, brass, copper, tin, silver and even gold. It doesn't matter what is the cost or even availability. For our normal daily uses we try to prefer iron, aluminum and even brass and even copper. Occasionally we even use gild and silver. The metal aluminum we use for the food wrapping and even for the packing of toffee in our daily life. Therefore I conclude that we cannot imagine a life with out metals in the cities.