Some young people love living in the city/ others don’t like it at all. (although / however)
Although some young people love living in the city, others don’t like it at all. /Some young people love living in the city; however, others don’t like it at al
Public transport can be very overcrowded / people still use it. (despite the fact / while)
Despite the fact that public transport can be very overcrowded, people still use it. / Public transport can be very overcrowded, while people still use it.
Life in the city is exciting / it can be stressful. (while / however).
While life in the city is exciting, it can be stressful. / Life in the city is exciting. However, it can be stressful.