The city was basically built from oyster shells
As the city expanded, many of the buildings (including Trinity Church) depended on the burning of oyster shells for lime. It was so common, private homes in the city built their cellars with one side open for burning shells whenever household repairs became necessary. But it turns out, the smoke was so thick and acrid, New Yorkers started to freak out and wonder if it was healthy for their precious air. So, on June 19, 1703, the New York provincial government passed an act that prohibited the burning of oyster shells within the city limits. Probably a good call.
Oyster carts were the original hot dog carts
Before there were hot dog carts on the corners, there were oyster carts on the streets. Oysters were also sold off boats tied up along the canals. You basically couldn’t throw an oyster shell without hitting another oyster vendor.