New York City is tackling its vermin population by mapping rat inspections across the city and posting the results online. By tracking the rat population, the Department of Health can pinpoint the worst affected areas, then direct a combination of resident groups and government departments to clean up homes, streets and parks. The effort reduced the rat population by up to 60% in some areas. Following these results, City Hall invested $32 million in a city-wide rat reduction plan in July 2017.

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