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Investment of about $1.2 trillion is required over the next 20 years across areas like transportation, energy and public security to build cities of tomorrow, IBM India Managing Director Shanker Annaswamy said today.

Speaking at the IBM Smarter Cities Forum, Annaswamy said quoting a McKinsey & Company report that it is estimated that USD 1.2 trillion capital investment is needed to meet projected demand in (Indian) cities to transform the cities going forward.