From Chris Smaje
The crops listed in your article championing the urban vertical farm as a “new, environmentally friendly way to feed the rapidly swelling populations of cities worldwide” are lettuce, spinach, kale, tomatoes, peppers, basil and strawberries (18 January, p 17).
Tasty, but no rice, wheat, maize or potatoes. Sounds more like garnishings for the wealthy than a way to feed cities.
Frome, Somerset, UK
