Comment Re:lettuce under LED grow lights? (Score 2) 279
In some locations, we have underwater hothouses, due to a lack of arable land (e.g. mountain states and provinces in the West). In other places, there's not a whole heck of a lot of sun, so using the energy from nearby wind and hydro, you can easily run LED to grow plants in seasons where it might not otherwise be viable.
Buildings can be built to grow things. Here at the UW, we have many buildings with green roofs and green walls, and some have entire bioenvelopes.