Mumbai
Predicted increase in population by 2025: 5.76 million
After quickly abandoning its manufacturing economy for one of service, the influx of capital into Mumbai continues to draw millions of migrants. Though the city boasts the highest GDP in South Asia, the haphazardness of work means that slums are still prominent throughout Mumbai, with the largest containing a population of more than a million people. Being located on a peninsula in the Arabian Sea makes Mumbai easily accessible from the water but a veritable nightmare to reach from the burgeoning suburbs. Traffic congestion and noise pollution plague the entirety of the city and stretch to the areas far away. And overconsumption, though not unique to Mumbai, is stretching its thin systems of public works. The city will have to upgrade its infrastructure in order to attend to the bustling population and improve transportation to move people in and out of the city at a quicker pace if it hopes to keep competitive.