Food - human life can't exist without it. It's a city's most important source of energy. In New York alone, 8 million people consume 10,000 tons of food every day. With demand for food in the city so high, the restaurants and supermarkets must be restocked on a daily basis. Without new supplies, cities will run out of fresh food in a matter of days.

Streaming video file encoded with permission for digital streaming by Infobase on October 29, 2015.

Introduction: Food Fight: How Cities Work --(1:28) -- New York City Delivery -- (2:21) -- Agricultural Factories -- (4:20) -- Processing Plants -- (4:40) -- Increasing Crop Yields -- (1:12) -- Billingsgate Fish Market -- (10:58) -- Sandwiches in the UK -- (6:11) -- Online Grocery Shopping -- (8:24) -- Urban Farming -- (4:37) -- High-Tech Farming -- (3:21) -- Pizza Delivery -- (1:56) -- Credits: Food Fight: How Cities Work -- (0:36).