[N] Its easy to understand why. In a way, genetically modified crops--now on some 109 million acres of farmland worldwide--are invisible. You cant see, taste or touch a gene inserted into a plant or sense its effects on the environment. You cant tell, just by looking, whether pollen containing a foreign gene can poison butterflies or fertilize plants miles away. That invisibility is precisely what worries people. How, exactly, will genetically modified crops affect the environment--and when will we notice?
[O] Advocates of genetically modified or transgenic crops say the plants will benefit the environment by requiring fewer toxic pesticides than conventional crops. But critics fear the potential risks and wonder how big the benefits really are. We have so many questions about these plants, remarks Guenther Stotzky, a soft microbiologist at New York University. Theres a lot we dont know and need to find out. As genetically modified crops multiply in the landscape, unprecedented numbers of researchers have started fanning into the fields to get the missing information. Some of their recent findings are reassuring; others suggest a need for vigilance.
46. According to the UNs prediction, the population growth from now to 2050 is nearly all in developing countries.
47. Those people and countries restricting and opposed to planting and importing of genetically modified $ plants worry about their safety.
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