StarLink Corn, an experimental genetically engineered crop that the USDA
found to be unsuitable for human consumption, hasn’t been grown by
farmers for several years. Yet recent analysis of this year’s harvest
has found that it is still contaminating 1% of the nation’s corn.
The discovery fuels the arguments of GE opponents, who claim that these
experimental crops should not be released on the market until they have
been adequately tested for effects on human health and the environment.
"The StarLink lesson is that contamination is to some extent irreversible,"
said Doreen Stabinsky, a Greenpeace scientist. Once a new genetically
engineered plant is released on the market, it is impossible to keep its
pollen from spreading, thereby leading to its existence in the food supply
indefinitely.  According to the European Union, this is one of the
reasons for its decision to resist growing and importing GE foods. /old_articles/ge/ge_corn_starlink.cfm