New York City streets were covered in horse poop in the late 1800s. With thousands of horses pulling on the streets every day, the city struggled to manage the massive amounts of waste. The stench and unsanitary conditions were unbearable. The poop also attracted flies and rats creating further health hazards. Now they tried to impose regulations to control the problem, but it wasn't really fixed until the automobile started replacing horses.
via zackdfilms
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