While the previous example of sustainable development focuses on structure, green space is about open spaces in urban areas., such as foliage-filled public parks and recreation areas. 

Data says more than two-thirds of the world's population will live in cities2. It will be crowded with buildings and infrastructures to support the people, and nature needs more space to grow and thrive.

We can improve air quality by having more green spaces full of trees. Aside from producing oxygen, trees regulate rainwater by filtering out pollutants.

Addressing the urban island heat effect is also vital. This phenomenon refers to the trapped heat generated by human activities, specifically roads and other concrete structures. By adding green rooftops, people can save the energy used for cooling. 

Green spaces in urban regions  could be parks, community gardens, or rooftop gardens. These spaces help us control insects and improve biodiversity. They will also enhance the quality of living.