Greenhouse with Photovoltaic Glass (Eric Heinzman)
via ericheinzman.com
A positive-greenhouse that produces electricity for its own needs and more is a really clever integration.
The greenhouse could also be made using thin-film photovoltaic panels on a portion of its sunroof where the climate allows, such as tropical and desert climates.
The extra electricity produced can then be sold back to the grid, to generate an extra profit to the greenhouse, and as electrical storage.