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Urban green corridors are a subset of wildlife corridors that function as nature-based solutions for climate adaptation within built-up areas^[1]. They typically consist of linear or semi-linear green spaces that connect major green areas within a city, including public parks, private green spaces, tree-lined streets, and other vegetated areas and are implemented at the city scale^[2][3] balancing the relationship between ecological protection and urban development^[4].

Urban green corridors are ecological connectors rather than purely recreational or scenic spaces^[5]. Nevertheless, they also provide multiple environmental, social, and economic benefits, including biodiversity support, climate regulation, and improved human well-being.  

These corridors can also be integrated within urban blue infrastructure, such as rivers, canals, and stormwater systems, forming blue-green corridors that further enhances ecosystem services and climate resilience^[6].

• Microclimate Regulation: Green corridors influence the microclimate of urban areas by introducing continuous vegetated spaces that extend through cities(6). These corridors positively contribute to environmental health by reducing local temperatures and improving air pollution, thereby helping to mitigate environmental pollution.^[6] These corridors also play an important role in mitigating the urban heat island effect. A street-scale study of a green corridor in Lima, Peru, demonstrated measureable local cooling effects^[7]. Similarly, a study conducted in Barcelona, Spain, found that the presence of green corridors was associated with a maximum temperature reduction of up to 0.42°C per census tract.^[8]

• Climate Change Adaptation: Urban green corridors contribute to climate change adaptation by enhancing ecological connectivity, supporting biodiversity and moderating urban microclimates^[9]. By linking gardens, woodlands, and other green spaces, these corridors help reduce the negative impacts of habitat fragmentation and enable species movement across urban landscapes, which is essential for maintaining ecological resilience under changing climatic conditions^[10] . In addition, green corridors can improve urban ventilation by allowing cooler air from less densely built areas to flow into highly urbanised zones, which supports in mitigating the urban heat island effect^[11] . Vegetation within these corridors further contributes to cooling through shading and evapotranspiration, which is a process that reduces local temperatures^[12] .Furthermore, connected green infrastructure also enhances water retention, making green corridors an important flood prevention measure, which supports adaptation strategies by helping cities manage increasingly intense rainfall events under climate change.^[13] .

• Biodiversity and species abundance: The presence of green corridors contributes to the presence of rare species, highlighting their role in promoting urban biodiversity by allowing less common species to colonize cities. In addition, green corridors and their connected green areas also support the presence of common species.^[14] 

• Health Impact: Green corridors can have positive impacts on the health of urban residents. A study illustrates that increased exposure to green corridors could prevent 178 premature deaths per year among adult residents. They express this as 13 deaths prevented per 100,000 inhabitants per year.^[15]In addition, another study assessed the mental health benefits of implementing the green corridors and reported a significant reduction in self-perceived poor mental health cases (14 %), visits to mental health specialists (13 %), and usage of antidepressants (13 %) and tranquilizers/sedatives (8 %), resulting in notable annual cost savings in mental health care.^[16]

• Social benefits: Green corridors have shown to improve overall societal well-being^[17] and strengthen social cohesion among citizens^[18]. They enhance people’s connection to nature and provide accessible spaces for recreation and relaxation, which contribute to improved physical and mental health. These social benefits align with Sustainable Development Goal 11 by promoting inclusive access to green spaces in urban environments^[19]. Furthermore, urban green corridors have demonstrated social and climate resilience during periods of environmental stress and crises such as the COVID-19 pandemic^[20].

• Economic benefits: Urban green corridors provide economic advantages, including the creation of green jobs in planning, construction, restoration, and management of green infrastructure  ^[15]. They can also support local economies by promoting tourism and enhancing the attractiveness of urban areas^[21].

Like other urban greening strategies, green corridors encounter several barriers, notably technical, financial, political, social, and regulatory factors^[22]. One key challenge is that the planning of a green corridor requires strong scientific grounding, as its biodiversity is closely dependent on the ecological quality and land use of adjoining green spaces^[23]. A lack of such understanding prior to implementation can result in ineffective or poorly functioning systems; for example, green corridors may unintentionally increase exposure to allergenic pollen and exacerbate allergy symptoms^[24].

In rapidly growing urban areas, prioritising wildlife and green spaces becomes increasingly difficult due to property ownership constraints^[25] and community resistance, particularly related to safety concerns. One study found that 58% of users perceive tall grasses as potential habitats for dangerous insects^[26]<. Additionally, authorities may view green corridors as land that does not directly contribute to economic growth. This perception is reinforced by the fragmentation of green spaces resulting from suburban development, including the construction of local factories and increasing demand for residential areas^[27].

Finally, the global body of research on urban green corridors remains limited, indicating a need for further empirical studies to better understand their design, functioning, and long-term impacts^[28].