A decade back, in 2011, the total population of Tamil Nadu stood at approximately 70 million, with Chennai making up for around 4 million. However, the rapid urbanisation and industrial growth of the city witnessed rapid migration from all over Tamil Nadu and several parts of the country as well, attracted by the good infrastructure, high standard of living, good job opportunities and peaceful law and order.

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https://www.dtnext.in/News/City/2021/12/11154730/1333257/Crowded-with-opportunities-Or-just-crowded--Chennai-.vpf