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Less Nutritious Grains May Be In Our Future

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 <em>Nature.</em> (iStockphoto.com)
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. (iStockphoto.com)

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