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| 简 介 |
Millions of people die of hunger in southern Africa every year, but when Zambia was offered thousands of tons of free maize by the US, the government politely paid no．
“We don’t know whether the food is safe,” said Zambia’s commerce, Trade and Industry Minister Dipak Patel．
His worries are shared by countries around the world that are in two minds about America’s genetically modified（GM，转基因的）crops．Just last week, EU（欧盟）member nations were discussing whether or not to import GM sweet corn from the US．
Ever since people started farming, they have tried to crossbreed（杂交） plants to make them stronger or better tasting．At one time, only related plants could be crossed with each other．
But when GM techniques were developed in the 1970s, scientists were able to put a single gene from a living creature into an unrelated creature．
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