This video podcast examines the relationship between energy prices, which increased sharply in mid-2008, and a corresponding increase in food prices. Today, food travels an average of 1,500 miles from its production source to plate. But the long-term decline of cheap, abundant fuel is leading to the end of cheap food. Unpredictable fossil fuel costs and the United States' federal ethanol subsidies are both reshaping the global food economy.

"e²: the economies of being environmentally conscious" is an ongoing PBS documentary series about solutions to the world's most pervasive environmental challenges. The latest addition to the series - "e² transport" - examines transportation alternatives and urban planning in cities around the world. Check your local PBS listings for television broadcast dates in your area.

The "e²" series and its video podcasts are produced by kontentreal, and distributed within the United States by PBS. More information is available at pbs.org/e2/ and e2-series.com/