Urban offsetting model (biodiversity or water)

The Nyashishi wetland is located on the western side of Lake Victoria some 15 km from Mwanza, a port city of the lake. The area is characterized by a double maxima rainfall, with heavy rains occurring during October to December. The wetland is traversed by the Nyashishi River, which is an intermittent river draining stormy waters and domestic waste water into Lake Victoria. Increased human socio-economic activities in Mwanza, such as horticulture, overgrazing and discharge of industrial effluents, have degraded the Nyashishi wetland. As a result, vegetation specifically elephantiasis and papyrus that used to flourish in the wetland and provide fish breeding grounds have disappeared. The crocodiles, large lizards and a host of other creatures that used to populate those areas cannot be seen today. Since the wetland and the river are part of the Lake Victoria Basin, both have been subjected to floods and droughts, impacting livelihoods, public health and the environment. The root causes of floods are irregular seasonal and year to year variability in rainfall patterns, combined with mismanagement of land and water resources, leading to soil erosion and increased run-off. Therefore restoration efforts in the area are much needed. (1, 5)

Parc Marianne is an ecodistrict that aims to address multiple challenges such as climate action for adaptation, environmental quality, flooding, and in response to the high population growth in Montpellier. Parc Marianne is connected to public transportation, has bicycle lanes and car parks, and the sidewalk is shared between pedestrians and bicyclists and structured with trees and other greenery. The park was certified with the ecodistrict label in 2015 following requirements like environmental sustainability, thermal performance, quality of life, nature and biodiversity, and mobility (Ref. 1). Parc Marianne is a mixed neighbourhood with an ability to combine city and nature, quality of life and centrality (Ref. 2).

The 2,044 square meters green roof on Sharrow School in Sheffield is designed to reflect the different habitats surrounding the city and includes a wildflower meadow and grassland plants as well as a wetland area with a small pond. The aim of the green roof was to provide added value by assisting the control of stormwater, humidity, noise, heat and pollution. It has been declared as a Local Nature Reserve by Sheffield City Council with the support of Natural England, in recognition of the importance of the roof to wildlife and educating the school's pupils about nature and the environment.[1][2]

The Lama Balice Nature Park is located near a long 'lama', which is a deep karst gorge, located north of the city of Bari. Established in an abandoned site, the nature park protects the area of the riverbed in the periphery of the city, acting as a natural channel for regulating water flow. It also serves as a recreational and cultural hub, while conserving agricultural functions and maintaining biodiversity. An administrative body consisting of the participating local mayors has been set up to manage the protected area. [1][2]

The Square Metre for Butterflies project was initiated by the Royal Botanic Gardens of Edinburgh (RBGE), in partnership with the Butterfly Conservation Trust, as an Edinburgh Living Landscape network membership activity. By planting relatively small-sized patches of caterpillar food plants on the roofs of mainly office buildings, the aim of the project is to enhance green roofs in order to increase their value for biodiversity, and for native butterflies in particular. Office buildings in Edinburgh’s city centre are targeted because of their location close to Arthur’s Seat hill, which is the natural habitat of Edinburgh’s butterflies. [ref 1]

The John Muir Pollinator Way is an initiative by the NGO Buglife to create and restore pollinator habitats along a 215 km long-distance active travel route – The John Muir Way – across the densely populated central belt of Scotland. The John Muir Pollinator Way is the first B-Line ‘pathway’ in Scotland and stretches from Helensburgh in the west to Dunbar in the east (Emilie). It is an ambitious project given the length (215 km) of this pathway. It connects nine different local authorities and 40 km of the total length falls within the Edinburgh local authority area (Burgess, 2016). This not only serves to halt the process of declining pollinator numbers providing crucial ecosystem services, but also helps people to connect with nature. Between July 2015 and March 2017, project partners and volunteers have transformed 19 sites into species-rich grassland. [ref 1]

The Tree Strategy is a municipal action plan in progress, aiming to address some of the main sustainability challenges described in the Environmental Program of Malmö City. Its main relations to sustainability challenges include improved health and well-being, decrease differences in those among different social groups and increase biodiversity. The Strategy includes a range of possibilities for evaluating its ecological and social success (ref. 1).

‘I have a bee’ (IHAB) is an organisation for hobby beekeepers. It contributes to a sustainable and long-term solution to the bee colony collapse phenomenon by popularizing bee keeping as a hobby. It was founded by 3 hobbyist beekeepers back in 2014. The idea originated from their passion for beekeeping and the desire to breed and keep bees as pets. The group has engaged in research about the roots of traditional beekeeping and designed a new top bar hive which has the advantage of being usable in backyards or on city terraces. (Ref 1) Their 1,000,000 beehive initiative aims to ignite 1,000,000 people around the world to watch at least one beehive. (Ref 3) No information found on status of project as of September 2020.

The idea of beekeeping originated from AUDI AG, Audi Hungaria's parent company. In 2015, Audi Hungaria was in the midst of implementing its flora and fauna protection plan thus the beekeeping idea was in line with ongoing developments, and was quickly taken up by management. 6 bee colonies with 270,000 bees were installed in September 2015. The bees produce 200-240 kilograms of honey each year, which is branded as Audi Hungaria Premium Honey, and gifted to visitors, as well as purchasable in the gift shop. The income is used for nature conservation programmes. The company also cooperates with the University of Sopron in a biomonitoring project which uses the bees as bioindicators of environmental pollution. (Reference 1)

A local government-led project of the renaturalization of the part of the Weser river shore. The initiative aimed to restore part of the river bank to its natural state and to create habitats for the typical local flora and fauna. Additionally, a sand beach for the public was created. The project aimed to increase biodiversity, increase the river shore protection and water management, as well as to improve public access to the recreational area at the water and the attractiveness of the river landscape (Ref. 1, 2, 5).