Kathy Del Tonto (far right) participates in a class that teaches school cafeteria workers how to prepare meals from scratch. LiveWell Colorado hide caption

itoggle caption LiveWell Colorado

A detail of a map from Food: An Atlas that shows sources of food found at farmer's markets in Berkeley, California. Cameron Reed/Food: An Atlas hide caption

itoggle caption Cameron Reed/Food: An Atlas

Still Life with Fruit and Nuts, by Robert Seldon Duncanson Courtesy National Gallery of Art, Washington hide caption

itoggle caption Courtesy National Gallery of Art, Washington

STD cupcakes: From Two Little Cats Bakery in Cambridge & Hertfordshire, these chocolate cupcakes feature symptoms of sexually transmitted diseases, including gonorrhea, syphilis, genital warts, chlamydia and HIV. Eat Your Heart Out 2012 hide caption

itoggle caption Eat Your Heart Out 2012

An urban farmer waters his plants near Bamako, Mali, where the government has set aside nearly 250 acres for market gardens. donkeycart/Flickr hide caption

itoggle caption donkeycart/Flickr