[BBC] A US biotechnology company is set to introduce a controversial new
genetically modified corn to help farmers fight resistant weeds.
Dow Agrosciences says its new GM product is based on a chemical that
was once a component of the Vietnam war defoliant, Agent Orange.
It is needed they say because so called "superweeds" are now affecting up to 15 million acres of American crops.
Thousands of farmers across the US now face similar problems with weeds
that can withstand powerful herbicides. Scientists say it is because of
the success of GM crops that were introduced in the mid 1990s.
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