2020届高三英语专项训练——阅读理解D篇 （一） A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops. Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protei[来自e网通极速客户端]
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