How to buy the best organic foods

Americans spent close to $28 billion in 2008 on organic edibles, up from $1 billion in 1990, according to The Organic Trade Association. And organic foods remain an area of growth even with the rising cost of grocery items and tougher economic times.

If you're fueling these double-digit sales, you likely already have your reasons for buying organic. Even so, recent changes to America's food buying habits -- the rise of the local-food movement, increased awareness about foods' carbon footprint (the amount of greenhouse gasses released when producing and transporting goods) -- may leave you wondering where organic foods fit into a better-for-the-environment equation.