Chennai being the fourth most populous metropolitan area and the fifth most populous city in India, it is also the world’s 36th largest metropolitan area.Chennai had a population of 4.34 million in the 2001 census within the area administered by the Corporation of Chennai and an extended Metropolitan Population of 6.5 million. a The urban agglomeration of metropolitan Chennai has an estimated population over 8.2 million people. According to an AC Nielsen survey, Chennai is regarded as one of the cleanest cities in India. Chennai's economy has a broad industrial base in the automobile, computer, technology, hardware manufacturing, and healthcare industries. The city is India's second largest exporter of software, information technology (IT) and information-technology-enabled services (ITES). A major chunk of India's automobile manufacturing industry is based in and around the city.Chennai Zone contributes 39 per cent of the State's GDP. Chennai accounts for 60 per cent of the country's automotive exports, which leads it to be called as 'The Detroit of Asia'. maximum temperatures around 38--42 °C (100--108 °F). The coolest part of the year is January, with minimum temperatures around 18--20 °C (64--68 °F) The lowest temperature recorded is 15.8 °C (60.4 °F) and highest 45 °C (113 °F) Chennai Aero Park sucked up to become the largest integrated aerospace ecosystem in the world. The project is a pioneering initiative to mark India's entry into the global aerospace industry <b>...</b>