Explain how life in the cities improved in the lat 1800s and early 1900s. Be sure to describe innovations in public transport and travel along with how technology helped to solve some problems of crowding.

Please summarize it into 4 very short and simple sentences.

1. Public transport systems such as electric streetcars and subways were introduced, making travel within cities faster and more efficient.

2. The invention of the elevator allowed for taller buildings to be constructed, reducing crowding by utilizing vertical space.
3. Sewer systems and indoor plumbing improved sanitation, leading to cleaner and healthier living conditions in urban areas.
4. Technological advancements in communication, such as telephones and telegraphs, made it easier for city residents to connect and access information.