all water, low nutrition salad foods: cucumbers, radishes, lettuce, celery. waste of resources?

[retread]

18. My salads usually have carrots

From the same source:
Carrots are perhaps best known for their rich supply of the antioxidant nutrient that was actually named for them: beta-carotene. However, these delicious root vegetables are the source not only of beta-carotene, but also of a wide variety of antioxidants and other health-supporting nutrients. The areas of antioxidant benefits, cardiovascular benefits, and anti-cancer benefits are the best-researched areas of health research with respect to dietary intake of carrots.
Antioxidant Benefits

All varieties of carrots contain valuable amounts of antioxidant nutrients. Included here are traditional antioxidants like vitamin C, as well as phytonutrient antioxidants like beta-carotene. The list of carrot phytonutrient antioxidants is by no means limited to beta-carotene, however. This list includes:

Carotenoids
alpha-carotene
beta-carotene
lutein
Hydroxycinnamic acids
caffeic acid
coumaric acid
ferulic acid
Anthocyanindins
cyanidins
malvidins