Mumbai (Bombay) is the capital of Maharashtra state. It is situated on an island on the north west coast of India and has a population in excess of 8 million. It is one of the largest and most densely populated cities in the world, and the country's financial and commercial centre and principal port on the Arabian Sea. Mumbai is the centre of India's cotton-textile industry, but its other manufacturing industries are now well-diversified and its commercial and financial institutions strong and vigorous. It suffers, however, from the chronic ills of most large, expanding industrial cities, air and water pollution, slums, and overcrowding.