The growth of urban farming
For most people living in cities, buying fresh vegetables and fruits means a trip to the market. But how far does the produce have to travel to get to the store? In the United states, the average American produce has to travel 2,400 km to reach the supermarket where is it sold. And many other kinds of produce in the supermarket are imported from other countries, especially in the winter. It isn't hard to find fresh strawberries in the middle of january in Chicago. They have been flow in from South America.