Organic, Free Range, Natural, Local - What do all these really mean?

What is the difference between organic, free range, natural and local foods?  Is organic really better or is it just marketing?  This week Darlene Kvist, Licensed Nutritionist and Kara Carper, Nutrition Educator are joined by special guest Liz McMann from Mississippi Market Coop to explain the differences and to dispel the myth that it's too expensive to feed a family on healthy food.