A RESEARCH team at Purdue University in West Lafayette, Indiana, the USA, has warned that the risk of extinction of natural species from the introduction of genetically modified organisms is "greater than believed before." One surprising finding is that while GM species might be healthier they could also be less fertile and thus lead to a faster reduction in populations.

In 2000, William Muir, professor of animal sciences, and Richard Howard, professor of biology, found that a release of genetically modified fish that were larger - and ...

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