Difference between natural and organic
Natural is purely a marketing term, and it is essentially meaningless since it isn't regulated by the USDA (I'm assuming you are in the USA, I can't speak for other countries). Since the term isn't regulated (with the apparent exception of meat), any manufacturer can put it on any (non-meat) product that they want, whether it is actually "natural" or not.

Organic is well-defined by the USDA and places a number of restrictions on the types of pesticides and other chemicals that can be used to grow the crop. For things like meat, the organic label regulates both the drugs that the animal is given as well as the production of the feed.


  Certified organic food products are
  regulated by the U.S. Department of
  Agriculture and produced by farmers
  and manufacturers under a strict set
  of rules. But the agency defines the
  term "natural" only for meat and
  poultry. In the rest of the food
  industry, the meaning is largely up to
  the producer.


See: http://articles.chicagotribune.com/2009-07-10/business/chi-natural-foods-10-jul10_1_organics-or-least-chip-popular-horizon-organic-brand-organic-industry-watchdog-group