1. Cost: Building sustainable cities and infrastructure can be more expensive than traditional methods. Additionally, retrofitting existing buildings or infrastructure can be even more costly.
2. Lack of public education: Educating the public on the importance of sustainable architecture and urbanism may pose a challenge due to the lack of knowledge and awareness.
3. Social equity: Sustainable urbanism may require changes to social structures within cities, which can lead to displacement of marginalized communities. Ensuring equitable access to sustainable resources is a critical challenge.
4. Governing policies: Governmental policies and regulations may be favorable for traditional methods and may not encourage sustainable urbanism.
5. Infrastructure limitations: Sustainable architecture and urbanism may require changes or additions to existing infrastructure, such as transportation and waste management systems, which may pose a challenge due to existing limitations.
6. Rapid urbanization: With urban growth and population density on the rise, implementing sustainable urbanism practices can be challenging due to the increased demand and pressure on resources.
7. Limited resources: Resources such as water and energy may be limited in urban areas. Sustainable urbanism must take the shortage of natural resources into account.
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