Most people in the world have never experienced the taste of the kind of tortillas Hilda Pastor makes using heirloom corn. That's because of the rise of mass-produced instant corn flour.
Driscoll's, the largest berry producer in the world, now grows about the same quantity of raspberries and strawberries in Mexico as it does in California. Many American producers have recently expanded their production to Mexico.
Cahokia Mounds State Historic Site in Collinsville, Ill. A thriving American Indian city that rose to prominence after A.D. 900 owing to successful maize farming, it may have collapsed because of changing climate.
Sunlight streams into a corn storage building at a Michlig Grain storage facility in Sheffield, Illinois, U.S., on Oct. 31, 2014. The price of corn has been falling for months.
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A corn purchaser writes on his account in northwest China in 2012. In November 2013, officials began rejecting imports of U.S. corn when they detected traces of a new gene not yet approved in China.
Wheat fields like this one could yield wheat with less zinc and iron in the future if they are exposed to higher levels of CO2, according to the journal Nature.