Surfshark recently released the results of a global survey of 150 cities, showing those with the most surveillance cameras per square kilometer. Chennai with 657 and Hyderabad, India top the list. Six Chinese cities are also in the top 10 as is London with 399. Paris has 254, whereas New York City cames in with under 26 per square kilometer. Surfshark projects the global number of CCTVs will hit one billion by the end of 2021.