A new study finds that higher carbon dioxide concentrations reduce the nutritional quality of rice. Pictured: a rice farmer plowing a field in Vietnam. Nguyen Anh Tuan/Flickr Chelsea Harvey , E&E News reporter Published: Thursday, May 24, 2018 One of the world's most important food crops may be declining in quality due to greenhouse gas emissions. One of the world's most important food crops may be declining in quality due to greenhouse gas emissions. The results of a major study , published yesterday in Science Advances , suggest that rice — a crucial food source for billions of people — is less nutritious when grown under higher carbon dioxide concentrations. Its stores of protein, iron, zinc and some important B vitamins all decline. That's a potential concern for public health, the authors say, particularly in poorer nations where rice makes up a large proportion of people's diet. "These results indicate that the role of rising CO2
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