Install vertical or horizontal artificial surfaces that help with carbon storage and cooling

The Urban Environment Observatory Building (OMAU) was built in Malaga as part of the URB-AL 1998 project, it is a construction planned for environmental conservation and includes an ecological cover for the use of rain water in the supply to the structure's watering system. (Ref 2, 3)

One of the largest green roof building sites in Switzerland, the new dispatch building at Kloten International Airport is Dock E. Previously known as Dock Midfield the building is situated between take-off runways and landing strips. The roof is sporting an extensive green roof measuring 4,000 m2 (43,056 sf). Dock Midfield represents a perfect example how green space can be regained on roofs. Completed in November 2002 after years of detailed discussions, the planning group decided to install ZinCo green roof systems. (Ref 1)

Under the “Bahn 2000” project while restructuring the main railway station of Zurich, a green roof has been implemented on one of the platforms. The whole area was mapped as a sensitive area, a living space for different endangered insects and reptiles whose natural environment consisted of desert-like spaces. Swiss law prohibits the destruction of such biotopes without replacement. In their protection, the idea of using the rooftop as a replacement was suggested and accepted by the administration. The roof was planned with a special focus on the living space demands of the different species. (Ref 1)

The winners of Smogathon 2016 suggested building a large green wall in the centre of Kraków. Based on the modern technologies the artificially placed wall made of metal and moss would clean local air, lower the temperature, retain water, increase biodiversity and serve as a decoration for the city centre [1,2]. The project was not completed due to lack of scientific data on its effectiveness and the weak price and outcomes balance; the city is still searching for more economical and practical solutions [6].

The project involves the BBC Drama Village - a combination of studios and stores with associated offices and technical suites. It was the requirement for all buildings to achieve a BREEAM Excellent standard (ref 1). GreenBlue Urban structural RootCell systems were used for this development to create adequate tree root volumes, to ensure optimum tree establishment and growth in a demanding coastal location (ref 2). A Living Wall has been made which has a number of functions including the provision of a new home for solitary bees, lacewings and other invertebrates. A rainwater harvesting system has been installed (ref 1). Speaking generally, the studio, stores and office amounted to over 18,000 square meters and 900 new meters of HV, gas water drainage and telecoms (ref 1). Areas of eco-design include transportation, energy efficiency, water efficiency, materials, indoor environmental quality, waste reduction and biodiversity (ref 1).

The Hetton Lyons Primary School's green roof is designed to evolve and flourish over the coming years, helping to combat a number of climate change issues facing the next generation. Aims were ecological benefits, providing a natural habitat for plants and wildlife while helping to reduce air and noise pollution, cutting carbon emissions and assisting with rainwater retention and attenuation (Ref 1).

In 2008 the new building of the WGV-Insurance has been opened in Stuttgart. Since then customers and employees of the WGV have enjoyed the beautiful courtyards which contribute to a good working environment. The approx. 3.6 ft. (1.1 m) high, built-in planters have been provided with an automatic irrigation system with the irrigation pipes installed below the elevated concrete slabs. The four courtyards have been planted with a total of 58 small crowned trees. In addition, several extensive green roof areas of approx. 21,600 sq. ft. (2,000 m²) total were installed to improve the Stuttgart climate. (1, 6).

The 40-storey mixed-use skyscraper will serve as an economic catalyst for the French city’s central business district and comprise offices, a hotel, a restaurant, and residences. The tree-covered areas of the tower will give the building its iconic appearance and a portion of that green space will be open to public use (Ref. 1). Trees will line the platform of the building and a ribbon of gardens will curl around the glass facade to its full height (Ref. 2).

Greened-over urban railway tracks (grass tracks) is a city-wide program in Stuttgart which assumes the construction of tram lines with grassed-over tracks. This applies not only to planning and construction but also long-term maintenance (ref 1).

In 2008, a green wall of more than 500 m^2 using a hydroponic watering system was developed on the side of the Max Juvenal bridge. Designed by Patrick Blanc, french botanist and pioneer in the development of green walls, it is considered an "authentic work of art, which evolves over time and the seasons and contributes to "renaturing" the urban space" (Ref. 4, page 7). The wall is intended to illustrate the benefits that green walls can bring to the environment, such as the reduction of heat islands in urban areas and their contribution to cleaner air due to the production of oxygen and the reduction of CO2 rate by photosynthesis (Ref. 1).