In America, before the motor vehicle, transportation depended entirely on the urban horse, which dropped, without restraint, 25 to 50 pounds of manure on the streets every day together with a gallon of urine.
Ne Amerike, perpara makines, transporti varej krejtesisht nga kali, i cili leshonte, pa frike, 25-50 pound bajga ne rruge cdo dite se bashku me nje gallon urine.