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World's smart cities

Boston: One of the oldest cities in the United States of America (USA), Boston has various parts wired with acoustic sensors to detect and pinpoint locations of gunshots. Known as the 'ShotSpotter', the system is designed to detect locations of violence like gunshots in the city. With 222 such sensors around the city, this system also aids in detecting biological weapons.
Apart from crime, the city is also equipped to track greenhouse emissions and also has a software to predict the maintenance needed in sewer systems.

World's most futuristic cities

A number of international capitals are leaders in using 'smart' technologies--citywide high-speed Internet access, for example--to improve the lives of their citizens. A recent BBC report lists the 10 innovative cities that have leapt most boldly into the future.