Why is it urgent to make cities greener?
Urban greening is one of the tools available to local governments to address three major challenges.
Global Warming and Quality of Life
Heat waves are more frequent, last longer, and bring record-breaking temperatures. Cities, with their high concentration of concrete, accumulate heat during the day and release it at night. The result: stifling nights and a rapid decline in comfort for city dwellers.
Greening urban spaces works on two levels:
- Shade protects surfaces from direct sunlight.
- Evapotranspiration cools the surrounding air.
Mature shade trees lower the perceived temperature by 3 to 5 °C in their immediate vicinity. On a smaller scale, a planted window box or a green pergola creates a more temperate microclimate.