U.S. Trade Representative Robert Zoellick is trying to woo Africa to his side of the debate on genetically modified crops, reports say. South Africa has approved the use of bioengineered corn and cotton; Zimbabwe, Kenya and Swaziland are said to be considering the issue. With Africa's support, Zoellick is expected to try to convince Europe -- with markets for the biotech crops potentially reaching several billion dollars a year -- to use biotech seeds.

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