Another project, which has literally given the THORNICO Building a green profile, is the ‘Green Park’. The project includes covering the 5,000 square metres of facade of the THORNICO Building’s car parking facilities with ivy, thus making a fully-grown living green wall that has the same filtering effect as 200 mature trees. In fact, it has become one of the largest vertical green walls in Europe, and consequently, an inspirational source for sustainable thinking and a landmark for Rotterdam. Besides this filtering effect, the green facade also counterworks the urban heat effect in the city by reducing radiant heat and relieving the overburdened sewer system when rainwater is retained to irrigate the plants.