How did the techniques of Colonel Waring’s “white ducks” improve city sanitation

all filth that was filling new yorks street was recycled and ash is accumulated in landfills. Organic waste of the human and animal nature is boiled down into oil and grease instead of being simply disposed of. Waring and his men clean 433 miles of street

explanation: j

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.