In 1893, 2.5 million pounds of horse manure filled NYC streets per day | Human Interest | Scoop.it
From factually.gizmodo.com - July 12, 2014 3:30 AM
Think New York summers are pungent now? Imagine what it must've smelled like at the turn of the 20th century. Before the introduction of the automobile, horses were leaving about 2.5 million pounds of shit in the streets per day.

Via Susie Blackmon