As a project manager for the "Community Carnival," here’s how I would promote ethics and sustainability within the project team:

### 1. **Set Clear Expectations**
   - **Action**: I would clearly explain the importance of ethical behavior and sustainability to the team from the start.
   - **How**: Share a code of conduct and sustainability guidelines for everyone to follow.

### 2. **Lead by Example**
   - **Action**: I would act ethically and make sustainable choices myself, setting the tone for the team.
   - **How**: Choose eco-friendly vendors and be transparent in all decisions.

### 3. **Encourage Open Communication**
   - **Action**: Make sure the team feels comfortable discussing ethical issues or sustainability challenges.
   - **How**: Hold regular meetings where team members can raise concerns and ideas.

### 4. **Provide Training and Resources**
   - **Action**: Offer training to help the team understand ethical practices and sustainability.
   - **How**: Organize workshops or provide reading materials about ethical decision-making and green practices.

### 5. **Include Ethics in Decision-Making**
   - **Action**: Ensure that ethical and sustainability considerations are part of every decision.
   - **How**: When choosing vendors or planning activities, ask how they meet ethical and environmental standards.

### 6. **Recognize Good Practices**
   - **Action**: Praise team members who demonstrate strong ethical behavior or come up with good sustainability ideas.
   - **How**: Acknowledge their efforts in team meetings and celebrate their contributions.

### 7. **Hold Team Members Accountable**
   - **Action**: Make sure everyone is following ethical guidelines and sustainable practices.
   - **How**: Check in on progress and address any issues quickly.

### 8. **Engage Stakeholders**
   - **Action**: Get sponsors, vendors, and the community involved in the event’s ethical and sustainability goals.
   - **How**: Share these values with them and make sure they align with the carnival’s practices.

### 9. **Monitor Progress**
   - **Action**: Regularly check if the team is meeting ethical and sustainability goals.
   - **How**: Track things like waste reduction and ethical vendor choices throughout the planning process.

### 10. **Address Problems Quickly**
   - **Action**: If any issues with ethics or sustainability arise, tackle them immediately.
   - **How**: Work with the team to find solutions and make adjustments if needed.

### Conclusion
By setting clear expectations, leading by example, and providing support, I would create a team culture where ethics and sustainability are a priority. This ensures the carnival is successful, responsible, and enjoyable for everyone.