Urban areas in both less economically developed and more economically developed countries are changing in different ways due to factors like population growth and increased car ownership. Problems in towns that have led to solutions like urban decay, with derelict land and buildings, and traffic congestion from poor infrastructure. Urban renewal aims to regenerate urban areas through gentrification, improving appearances and culture, changing populations, reducing crime, and influencing perceptions through media. Suburbanization, decentralization, and urban sprawl affect regeneration, as do concepts like urban consolidation, counterurbanization, new towns, and preventing urban blight and spatial exclusion.