Bombay is the richest city of India, mostly because of the trade overseas and by air. A third of the working population is employed in the industry and a fourth part works with trade or traffic. The products - like clothes, plastic articles and electronically equipment - that are made in the factories of Bombay, are exported to Iran, Iraq, Europe and the United States. To handle all this businesstrafic the facilities of the harbor of the city are constantly improving.