Urban decline refers to the process where a city or neighborhood experiences a decrease in economic activity, population, and overall quality of life. This often results in abandoned buildings, increased crime rates, and a lack of investment in infrastructure. Factors contributing to urban decline can include industrial changes, suburbanization, and economic downturns. As areas decline, residents may move away in search of better opportunities, leading to a further reduction in population. This cycle can create a negative feedback loop, where declining neighborhoods struggle to attract new businesses and residents, ultimately resulting in a diminished urban environment.