Fotografiska Museum is unique with a restaurant and this hydroponic (growing plants without soil). There are lettuces, cabbage and spices which will be served in the restaurant. The goal is to become self-sufficient in leafy greens.
The plants receive nutrients, moisture, light and heat plus the carbon dioxide that museum visitors exhale. 99% of the water is recycled. Since it is a controlled environment, pesticides don't need to be used. And there are no transport emissions because the restaurant is located in the same building.
en.wikipedia.org/wiki/Hydroponics