Bangalore is known as the "Silicon Valley of India" (or "IT capital of India") because of its role as the nation's leading information technology (IT) exporter. Indian technological organizations ISRO, Infosys andWipro are headquartered in the city. A demographically diverse city, Bangalore is the second fastest-growing major metropolis in India. It is home to many educational and research institutions in India. As a growing metropolitan city in a developing country, Bangalore confronts substantial pollution and other logistical and socio-economic problems.