Asia's largest slum lies smack bang between a high-tech business district with gleaming glass skyscrapers and a tiny Bombay suburb dotted with grand Art Deco mansions. The 600,000 residents of Dharavi are crammed into rows of makeshift shanties, cobbled together with nothing more than asbestos sheets, plastic, bamboo sticks, discarded canvas bags, wooden planks and old car tires. For many, this ramshackle district in a city of 12 million is merely a reminder that, despite impressive economic growth in recent years, India remains a very poor country.