Dan Charles

Dan Charles is NPR's food and agriculture correspondent.

Primarily responsible for covering farming and the food industry, Charles focuses on the stories of culture, business, and the science behind what arrives on your dinner plate.

This is his second time working for NPR; from 1993 to 1999, Charles was a technology correspondent at NPR. He returned in 2011.

During his time away from NPR, Charles was an independent writer and radio producer and occasionally filled in at NPR on the Science and National desks, and at Weekend Edition. Over the course of his career Charles has reported on software engineers in India, fertilizer use in China, dengue fever in Peru, alternative medicine in Germany, and efforts to turn around a troubled school in Washington, DC.

In 2009-2010, he taught journalism in Ukraine through the Fulbright program. He has been guest researcher at the Institute for Peace Research and Security Policy at the University of Hamburg, Germany, and a Knight Science Journalism fellow at the Massachusetts Institute of Technology.

From 1990 to 1993, Charles was a U.S. correspondent for New Scientist, a major British science magazine.

The author of two books, Charles wrote Master Mind: The Rise and Fall of Fritz Haber, The Nobel Laureate Who Launched the Age of Chemical Warfare (Ecco, 2005) and Lords of the Harvest: Biotech, Big Money, and the Future of Food (Perseus, 2001) about the making of genetically engineered crops.

Charles graduated magna cum laude from American University with a degree in economics and international affairs. After graduation Charles spent a year studying in Bonn, which was then part of West Germany, through the German Academic Exchange Service.

For the past two years, at an undisclosed location in the Upper Midwest, a large commercial egg farm has been probed with every tool of modern science. Researchers have collected data on feed consumed, eggs produced, rates of chicken death and injury, levels of dust in the air, microbial contamination and dollars spent. Graduate students have been assigned to watch hours of video of the hens in an effort to rate the animals' well-being.

When it comes to the current controversy over antibiotic use on farm animals, milk is in a special category.

Lactating cows, unlike hogs, cattle or chickens that are raised for their meat, don't receive antibiotics unless they are actually sick. That's because drug residues immediately appear in the cow's milk — a violation of food safety rules.

Milk shipments are tested for six of the most widely used antibiotics, and any truckload that tests positive is rejected. So when cows are treated, farmers discard their milk for several days until the residues disappear.

The political battle over immigration, now provoking a confrontation between Congress and the White House, touches all of us in one very direct way: our food. That salad mix, and those apples, may well have been harvested by workers who arrived here in the U.S. illegally.

We have good news for all of you who find browned apple slices unappetizing. It's bad news, though, if you don't like scientists fiddling with your food. The U.S. Department of Agriculture has given a green light to apples that have been genetically modified so that they don't turn brown when you cut them open.

The future of strawberry breeding at the University of California has been secured. Perhaps.

Three weeks ago, Sara Carlson was driving to her job in Ames, Iowa, when she turned on the radio and heard me talking about nitrates in Iowa's water.

"And I was like, 'I really hope he nails this,' " she says.

This topic is Carlson's specialty. She works with a group called Practical Farmers of Iowa. These farmers are devoted to farming in ways that protect the environment.

Here at The Salt, we have been overwhelmed with emails brimming with factoids and completely unsubstantiated assertions about the food that Americans will consume on Sunday as they watch gigantic athletes burn through calories at University of Phoenix Stadium in Glendale, Ariz.

For more than a year, a once-popular drug that makes cattle put on weight faster has been stuck in a kind of veterinary purgatory.

As far as the Food and Drug Administration is concerned, the drug, Zilmax, is legal to use. But large meat packers, which dominate the industry, have ostracized it after the drug was accused of making animals suffer. The drug's manufacturer, Merck, has been working on a plan to rehabilitate it. But that effort has stalled.

On the face of it, the new potato varieties called "Innate" seem attractive. If you peel the brown skin off their white flesh, you won't find many unsightly black spots. And when you fry them, you'll probably get a much smaller dose of a potentially harmful chemical.

But here's the catch: Some of the biggest potato buyers in the country, such as Frito-Lay and McDonald's, seem afraid to touch these potatoes. Others don't even want to talk about them because they are genetically modified organisms, or GMOs.

Des Moines, Iowa, is confronting the farms that surround it over pollution in two rivers that supply the city with drinking water. Des Moines Water Works says it will sue three neighboring counties for high nitrate levels in the Raccoon and Des Moines rivers. It's a novel attempt to control fertilizer runoff from farms, which has been largely unregulated.