"Scientists at Duke University in North Carolina have created pollen models that show tree pollen traveling from a forest in North Carolina for over 1,000 kilometers northward into eastern Canada. Scientists researching sterility in trees have admitted that 100 percent guaranteed sterility in GE trees is impossible. This evidence implies that if GE trees are released into the environment, widespread and irreversible contamination of native forests cannot be prevented."
Source: Anne Petermann of the Global Justice Ecology Project