Hebrew University scientists have found that “Vertical green-living walls” (VGWs) – plants growing vertically on a wall – can save up to 20% of the energy used for air circulation in closed offices and spaces. They reduce carbon dioxide levels and cool the air around the green wall.

https://unitedwithisrael.org/israeli-researchers-point-to-financial-benefits-of-indoor-vertical-green-living-walls/