A In 1998, the US Department of Agriculture released a study into fruit and vegetables arriving at the Chicago Terminal Market, the main point of distribution for the American Middle West. (8thparagraph)
B Cutting out all waste in the production and distribution of food is an impossible goal. (5thparagraph)
C Not just air, obviously; while plants are grown with roots hanging in the air, these roots are regularly sprayed with a nutrient-rich solution that gives them just what they need for optimum growth. (10thparagraph)
D Traditional farming is wasteful; modern intensive agriculture relies on large inputs of external resources, notably heat, water and nutrients. (11thparagraph)