The Salt What's On Your Plate

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Protesters demonstrate outside a McDonald's in Chicago. Hundreds of workers from McDonald's, Taco Bell, Wendy's and other fast-food chains were expected to walk off their jobs Thursday to push the companies to pay their employees at least $15 an hour, according to labor organizers. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

Customers shop for produce at the Danilovsky Market in Moscow. The food import ban prevents the import of almost all fresh food from the U.S., Europe and other Western countries. What's left in the market is grown locally or by Russian allies. Karoun Demirjian hide caption

itoggle caption Karoun Demirjian

People shop in a Miami grocery store on July 8. USDA says that despite the drop in unemployment, the number of food insecure Americans has not declined because higher food prices and inflation last year offset the benefits of a brighter job market. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

At left, a woman holds the saffron crocus during the saffron harvest in Herat, Afghanistan. At right, saffron flowers are collected in Saint Hippolyte, eastern France. Since the stigmas need to be picked from the flowers by hand, saffron is the world's most expensive spice. Majid Saeedi/Getty Images; Maxppp /Landov hide caption

itoggle caption Majid Saeedi/Getty Images; Maxppp /Landov

Across Washington State, hydroelectric dams are blocking salmon as they migrate to their spawning grounds. Enter the salmon cannon. Ingrid Taylar/Flickr hide caption

itoggle caption Ingrid Taylar/Flickr

A campaign called Behind The Brands, led by Oxfam International, is trying to make the inner workings of the 10 biggest food companies in the world more visible to consumers. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Tractors sit on a sugarcane plantation on the land of a Guarani-Kaiowá indigenous community in Brazil, where Oxfam has alleged "land grabs" unfairly take land from the poor. The United Nations is drafting voluntary guidelines for "responsible investment in agriculture and food systems" in response to such concerns. Tatiana Cardeal/Courtesy of Oxfam hide caption

itoggle caption Tatiana Cardeal/Courtesy of Oxfam

Edibles available at LoDo Wellness Center, a retail marijuana and medical marijuana dispensary and grow facility in downtown Denver. Matthew Staver/Landov hide caption

itoggle caption Matthew Staver/Landov

A street market remains empty in Monrovia's West Point slum as part of quarantine measures to contain the spread of Ebola in Liberia. Zoom Dosso/AFP/Getty Images hide caption

itoggle caption Zoom Dosso/AFP/Getty Images

Nestle, the world's biggest food company, manufactures and markets a wide range of food products including dairy, meat, poultry and eggs. Susana Gonzalez/Bloomberg via Getty Images hide caption

itoggle caption Susana Gonzalez/Bloomberg via Getty Images

A young Chinook salmon, called a smolt, near Vallejo, Calif., on April 24, 2014. North Coast tribes and environmentalists fear that the smolts and Chinooks may not survive this year's low river flows and warm water. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Ilias Smirlis (left) runs a small family farm in Kalamata, Greece. Before he met entrepreneur Sotiris Lymperopoulos, who runs the food service Radiki, he struggled to sell his produce outside Athens. "The demand for excellent products will always exist," Smirlis says. "The challenge is to find a market." Joanna Kakissis/NPR hide caption

itoggle caption Joanna Kakissis/NPR

Volunteers at the Maryland Food Bank in Baltimore sort and box food donations on a conveyor belt. The bank started working with groups like the USO in 2013 to provide food aid to families affiliated with nearby military bases. Pam Fessler/NPR hide caption

itoggle caption Pam Fessler/NPR

Asian carp, battered and fried. As the fish makes its unwelcome way up the Mississippi River, chefs are trying to get people to eat to beat it back. Louisiana Sea Grant/Flickr hide caption

itoggle caption Louisiana Sea Grant/Flickr