Cruise Ship
Cruise ships
Peace Boat's Ecoship, which is currently under construction to become the greenest cruise ship in the world. Photo via http://ecoship-pb.com.
Ecoship
The planned vertical garden within Ecoship will be used to cool the internal temperature. Photo via http://ecoship-pb.com.

Ecoship’s closed-loop water system will carry filtered wastewater to cool engines and to water the onboard vertical garden, which will be fertilized using organic waste materials. The gardens will also be part of the ship’s HVAC (Heating, Ventilation and Air Conditioning) system, as outside air will be part of the ship’s HVAC (Heating, Ventilation and Air Conditioning) system, as outside air will be part of the ship’s HVAC (Heating, Ventilation and Air Conditioning) system, as outside air will be pushed into the flora and then evaporate irrigating water sprays to cool the ship’s temperature.”