Big Cypress Swamp in Florida is home to a wide variety of birds, including the loud and lanky Limpkin. Michael Stein has more.

In parts of China, citrus fruit can no long be grown, due to a disease spread by plant lice that kills the trees. That disease has been creeping across the warmer regions of the United States and recently reached California, where it is now striking widespread fear. Ingrid Lobet reports.

A recent article questions whether food deserts - areas with minimal access to fresh fruits and vegetables - are as pervasive as some policymakers claimed. We recap a 2009 story about an area of Brooklyn where locals grow their own vegetables due to a lack of supermarkets, then host Bruce Gellerman updates talks with food writer and activist Mark Winne to update that story.

Many low-income neighborhoods in the United States lack access to fresh and affordable fruits and vegetables. Residents in these so-called ‘food deserts’ rely on neighborhood corner stores and fast food chains as their main sources of food. But, as Jessica Ilyse Kurn reports from New York City, a number of programs are working to close the food gap by bringing healthy foods close to home.

The Food and Drug Administration has announced new voluntary guidelines for the use of nano technology in food packaging and cosmetics. Dennis Keefe, director of FDA's office of food additive safety, tells host Bruce Gellerman that the guidelines reflect the FDA's best understanding of the emerging technology.

Clean energy isn't always green energy. That's the case in Scotland where some wind farms are built on peat bogs. Peat stores a lot of carbon, which is released into the atmosphere when turbines are built. From Radio Deutsche Welle, Peter Shevlin reports how scientists are assessing the environmental benefits and trade-offs of building windfarms on peat.

A prize-winning map tells the story of the United States as never before. Map-maker Dave Imus spent 6000 hours creating a depiction of America that is much art as it is cartography. He explains to host Bruce Gellerman why it takes a big sheet of paper to understand the beauty and vastness of this country. Then we celebrate National Poetry Month with a poem from Walt Whitman that celebrates America and its varied voices.

Obesity, diabetes, and high cholesterol all disproportionately affect the African American community. Studies show that a lack of access to fresh fruits and vegetables is often a major factor. Planet Harmony’s King Anyi Howell visits a farmer’s market in Los Angeles’ Crenshaw neighborhood that’s working to make vegetables more accessible. The farmers are finding that making vegetables available may be easier than getting customers to buy them.