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Develop urban sustainability projects

The presence of trees in urban areas is crucial to make the territory more livable and to fight the climate crisis. In addition to providing shade and aesthetic beauty, trees offer numerous benefits, including improved air quality, greater biodiversity and an increase in overall community well-being. To promote a greater presence of trees in our cities, it is possible to adopt the 3 -3 0 - 300 rule, an effective approach that can make a difference.


The 3 - 30 - 300 rule: an overview

view of a tree-lined urban avenue
Urban greenery

The 3 - 30 - 300 rule on urban sustainability adopts the following parameters:


  1. Look out your window and see if you see at least 3 decent-sized trees.

  2. Each neighborhood should cover at least 30% of its surface area with trees.

  3. The closest park or green space to you should be 300 meters from home/school/work.

Due to the climate crisis, more and more cities are increasing the amount of urban green areas, especially due to rising temperatures.


Trees have a significant impact on the quality of urban life because they help reduce air pollution, absorbing CO2 and other pollutants and returning oxygen to the air we breathe. Furthermore, they offer natural shade, reducing the need for air conditioning and thus contributing to energy savings. Trees also promote biodiversity, providing habitat for birds, insects and other species, thus creating a healthier and more sustainable urban ecosystem.


However, careful planning and collaboration between local governments, communities and environmental organizations is required. Cities should adopt urban policies and plans that encourage planting of trees and establish quantitative objectives to achieve the required distribution. Furthermore, it is important to involve citizens, educating them on the importance of trees and encouraging them to participate in initiatives for planting and caring for urban greenery.


Despite the many advantages, there are challenges to face: lack of available space, existing infrastructure and budgetary restrictions can represent obstacles. However, there are creative solutions such as the creation of vertical gardens, the use of green roofs and the planting of trees along streets and squares. Furthermore, public-private partnerships can play an important role in finance green projects.


The 3 - 30 - 300 rule offers a solid basis for increasing the presence of trees in our cities, improving the quality of life and the urban environment. It's an effort that requires planning, collaboration and community involvement, but the long-term benefits are invaluable. Taking concrete actions to implement this rule can help create greener, more sustainable and pleasant cities for all of us and for future generations.

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