Chris asked, "What happens the following years when seed spilled in
harvesting germinates and is a weed in other crops?  You can't use the
herbicide to get rid of it."

To the best of my knowledge, and I have done a fair amount of reading on the
subject, these seeds are specifically developed so that the herbicide
resistance will not continue into the 2nd generation.  The idea is that the
farmer must buy these seeds every year and cannot grow his own.  Sort of
like "seedless watermelon seeds", which sound like an oxymoron, but have
been around for 40 years.

In my personal view, the herbicide resistance is not a potential problem for
the environment.  A different argument is whether a private company should
be able to profit from such a development and potentially (through pricing)
withhold the food benefits from poor countries.  But that argument is all
wrapped up in socialism vrs capitalism.

The insect resistant crops are altogether a different matter.  While many
many plants contain natural insecticides that protect them from attack, I
don't think the existence of these natural defenses is sufficient argument
to say that reproducing the same defenses by genetic means is not without
danger to our environment.  IMHO, the jury is still out on this one.

Lloyd
Lloyd Spear Owner, Ross Rounds(tm).  The finest in comb honey production.
http://www.rossrounds.com