“Reduced heat island effect of large cities. (Professor Hiroyuki Yamada)”

“The temperature inside a building can be reduced to five degrees in the summer and maintained in winter, saving up to 500 € m2 per year. (Akira Hoyano Professor Tokyo Institute of Technology).”

“Reduced flooding and retention of rainwater from storms.”

“Encourages the use of unused urban spaces.”

“Water is not wasted because it is a closed water circuit.”

“No appeal to or admission of insects and bacteria since this system bears a biological repellent.”

“1m2 of vegetation produces oxygen required by a person in the whole year. (Darlington, 2001).”

“1m2 of vegetation traps 130 grams of dust per year. (Darlington, 2001).”

“The insulation plant reduced to 10 decibels of noise pollution. (Akira Hoyano Professor Tokyo Institute of Technology).”

Because the culture of sustainability in Spain is in development, green roofs and walls are promoted as a system of long-term waterproofing. If what wears down the waterproofing of any building is ultraviolet, when you install a green roof or wall you protect its waterproofing, increasing life from 5-10 years to over 30 years, which translates into considerable savings.

Vertical walls need little maintenance because they work on a hydroponic principal.   Water usage is minimal, since excess water returns to be collected and used for future watering by the closed circuit.  The only maintenance required is a periodic review of facilities and any pruning.