Final answer:
Gentrification is a process where neighborhoods in inner-city regions are renewed and redeveloped. It often leads to the displacement of less affluent residents and can cause traffic issues and increased pollution in cities.
Step-by-step explanation:
Gentrification is a process where a neighborhood in an inner-city region is redeveloped and renewed. It typically begins with lower-income residents improving the neighborhood until it becomes desirable for higher-income individuals to move there. Gentrification often leads to the displacement of less affluent residents, who are pushed into less desirable areas. This process can also result in traffic issues and increased pollution in the affected cities.