Atlanta, Georgia has experienced rapid population growth, making it the fastest growing metropolitan city in the United States. Recent growth has been fueled by newcomers from northern cities. This population growth has created problems like traffic congestion, degraded air and water quality, loss of green space, and socioeconomic division. Projections estimate the Atlanta metropolitan area will grow by 2.5 million people by 2040 due to a strong economy and projected job increases. Officials have a plan to invest in transportation and transit expansion to address the challenges of serving a larger population.