US scientists call for new rice varieties to prevent food shortages. - 28 Mar 2008  
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A peer-reviewed study by Elizabeth Ainsworth of the University of Illinois called “Rice Production in a Changing Climate” warns that increased temperatures and ground-level ozone concentrations threaten to drastically reduce rice yields around the world. New strains of rice must be bred immediately in response to the threat of a worldwide rice shortage.  Dr. Ainsworth said, “In places where the demand for food is already too great, things are going to get worse.”