Genetically modified organisms (GMOs) are a contentious issue, and Mark Lynas has been on both sides of the debate. He is the author of "How I Got Converted to G.M.O. Food."
Paul Quinn College was in the middle of a food desert. Its football team kept losing -- badly. So in 2010, the Dallas college decided to transform its football field into The We Over Me Farm.
"The dark history of bananas is we've exported a lot of the costs of this fruit in order to have a cheap, happy fruit here for the American consumer," says Nicole Vitello, president of the importer and wholesaler Equal Exchange Bananas.
While doing research for his book Pig Tales, author Barry Estabrook visited a farmer in Iowa who raised 150,000 pigs a year. What he saw at this factory farm -- which is the way 97 percent of pigs in the U.S. are raised -- is a far cry from Old MacDonald's.
It takes 1 gallon of water to grow a single almond, according to Tom Philpott, food and agriculture correspondent for Mother Jones and author of "California Goes Nuts." Eighty percent of the world's almonds are grown in California, which is experiencing a severe drought.
Lentil Underground, by Liz Carlisle, is the story of a group of farmers in Montana who broke free of the industrial farming system by growing organic lentils.
Chef Dan Barber, author of The Third Plate, says we need a food system that is both delicious and sustainable. "It's about the system that supports a whole ecology," he says.
How do you feed 9 billion people? That's an estimate of how many people will be living on the planet in 40 years. Dennis Dimick, the executive editor of National Geographic, explains Jonathan Foley's article "A Five-Step Plan to Feed the World."
"In order for it to grow around the world, it needs to be bred by plant breeders down to lower altitude," says journalist Lisa Hamilton. "The trouble is that those seeds -- that genetic diversity -- are owned by the people of the Andes."
Big companies such as Tyson Foods have 'chickenized' the meat business, according to Christopher Leonard, author of The Meat Racket.