A futuristic "living" building which will be home to plants, vegetables, fish and people has been given the go-ahead by Swansea councillors.
Greenhouses, terraces and rooftop gardens will sit above two floors of shops and offices.
Fish kept in tanks within the building will provide waste nutrients to feed the greenhouse vegetables.
A complex system of pipes will transport rainwater around the development.
Councillor Mary Jones said it was an exciting scheme but was concerned that the greenhouses, if not maintained, would become a "sludgy mess".
Mr Smith said a community interest company or residents would run the greenhouses, adding that he expected occupants of the tower would have "green fingers" and support the building's concept.