Urban sustainability is the practice of designing and operating cities in a way that meets the needs of current residents while also preserving natural resources and the environment for future generations. Urban sustainability aims to create healthy, livable, and economically vibrant cities that minimize their environmental impact and reduce greenhouse gas emissions.

To achieve urban sustainability, cities can adopt a variety of practices and policies, such as:

1. Promoting compact, mixed-use development: This can help to reduce the amount of land that is developed and preserve natural habitats, as well as reduce the need for transportation and the resulting greenhouse gas emissions.

2. Enhancing public transportation: Expanding and improving public transportation options can help to reduce traffic congestion and air pollution, as well as encourage more sustainable modes of transportation.

3. Promoting energy efficiency: Encouraging the use of energy-efficient buildings and appliances can help to reduce energy consumption and greenhouse gas emissions.

4. Protecting natural resources: Preserving and enhancing natural resources such as parks, green spaces, and natural habitats can help to improve the quality of life for residents and reduce the impact of urbanization on the environment.

5. Supporting sustainable agriculture: Promoting the use of sustainable farming practices and providing access to locally grown, healthy food can help to reduce the environmental impact of food production and improve public health.

By adopting these practices and others, cities can work towards greater urban sustainability and create more livable and environmentally friendly communities.