- Funding: Securing adequate funding can be difficult, especially for projects that are non-profit or have a long payback period. - Sustainability: Ensuring the long-term sustainability of the project requires ongoing community engagement, resource allocation, and sometimes adapting the project to changing conditions. - Cultural Barriers: Understanding and respecting local cultures and customs is crucial but can be challenging for outsiders. - Measurement of Impact: Assessing the social, economic, and environmental impact of the project can be complex and requires robust metrics and evaluation methods.