Answer:
1. **United Nations**:
- **Primary Purpose**: The primary purpose of creating the United Nations was to promote international cooperation, maintain peace and security, protect human rights, foster economic development, and provide a platform for dialogue and diplomacy among nations.
- **Examples**:
- Preventing future global conflicts through diplomacy and peacekeeping efforts.
- Addressing humanitarian crises and providing aid to countries in need.
- Facilitating international cooperation on issues like climate change, poverty, and health.
2. **Urban Renewal Projects**:
- **Purpose**:
- The purpose of urban renewal projects is to revitalize and improve urban areas by replacing deteriorated or outdated buildings, infrastructure, and public spaces with modern, functional, and aesthetically pleasing structures.
- **Examples**:
- Redeveloping run-down neighborhoods to create better housing, commercial spaces, and recreational facilities.
- Upgrading transportation systems, utilities, and green spaces to enhance the quality of life for residents.
- Attracting investment, promoting economic growth, and revitalizing urban centers to make them more vibrant and sustainable.