feat(tcg-env): add Environmental Sustainability TCG docs, closes #363

docs/community/tcgs/environmental-sustainability/index.md

@@ -0,0 +1,95 @@
+---
+title: Environmental Sustainability Technical Community Group
+sidebar_label: Environmental Sustainability
+tags:
+  - environmental-sustainability
+  - tcg
+  - operational-resilience
+---
+
+# Environmental Sustainability Technical Community Group
+
+The Environmental Sustainability Technical Community Group (TCG) advocates for, develops, supports, and evaluates environmental sustainability initiatives in cloud native technologies and practices.
+
+## Mission
+
+The Environmental Sustainability TCG serves as a community rallying point for discussing, sharing knowledge, and coordinating initiatives that help reduce the energy consumption and carbon footprint of cloud native technologies and practices. The group brings together practitioners, vendors, and end users focused on making sustainability a first-class concern across the cloud native landscape.
+
+## Focus Areas
+
+### Measurement and Tooling
+
+- **Energy and Carbon Metrics**: Quantifying the energy consumption and carbon footprint of cloud native workloads
+- **Measurement Tooling**: Supporting projects such as [Kepler](https://sustainable-computing.io/) for power and energy measurement
+- **Landscape Gaps**: Identifying gaps in environmental sustainability coverage across the CNCF landscape
+
+### Best Practices and Guidance
+
+- **Optimization Guidance**: Recommendations for reducing consumption in cloud native deployments
+- **Education**: Resources for end users, developers, and stakeholders on sustainable cloud native practices
+
+### Community and Advocacy
+
+- **Sustainability Advocacy**: Outreach, blogging, and awareness efforts across the community
+- **Cloud Native Sustainability Week**: Community-led events highlighting sustainability work
+- **External Collaboration**: Engagement with environmental and sustainability organizations outside CNCF
+
+## Getting Involved
+
+### Join the Community
+
+- **CNCF Community Groups**: [community.cncf.io/cloud-native-sustainability](https://community.cncf.io/cloud-native-sustainability/)
+- **CNCF Slack**: Join [slack.cncf.io](https://slack.cncf.io) and look for `#tag-environmental-sustainability`
+- **Meetings**: Check the community group page for the current meeting schedule
+
+### Contribute
+
+- **Share Your Work**: Present sustainability tooling, measurements, or case studies
+- **Participate in Initiatives**: Help with Green Reviews, Kepler, or advocacy efforts
+- **Ask Questions**: Learn from others working on cloud native sustainability
+- **Provide Feedback**: Help shape the group's direction and priorities
+
+## Organizers
+
+Technical Community Groups are led by community organizers who facilitate meetings, coordinate activities, and ensure the group delivers value to participants.
+
+To become an organizer or learn more about current organizers, check the group's page on [community.cncf.io](https://community.cncf.io/cloud-native-sustainability/) or reach out via the CNCF Slack.
+
+## Resources
+
+### CNCF Resources
+
+- [Technical Community Groups Overview](../index.md)
+- [TCG Governance](../../governance/tech-group-governance.md#technical-community-groups)
+- [CNCF Community Groups Program](https://github.com/cncf/communitygroups)
+
+### Related CNCF Groups
+
+- [TAG Operational Resilience](../../tags/operational-resilience/index.md) - Broader operational and sustainability topics
+
+### External Resources
+
+- [Kepler](https://sustainable-computing.io/) - Kubernetes-based Efficient Power Level Exporter
+- [CNCF Landscape](https://landscape.cncf.io/)
+
+## Evolution and Future
+
+As a Technical Community Group, the Environmental Sustainability TCG may evolve based on community needs:
+
+- **Current State**: Discussion and knowledge-sharing forum, continuing prior TAG initiatives
+- **Near Term**: Deliver initiatives like Green Reviews, tooling guidance, and best practices
+- **Long Term**: Potentially evolve into a TAG or subproject if sustained value and formal oversight is needed
+
+The community drives the direction and pace of this evolution.
+
+## Contact
+
+For questions or to get involved:
+
+- **CNCF Community Groups**: community-groups@cncf.io
+- **CNCF Slack**: [slack.cncf.io](https://slack.cncf.io)
+- **TOC**: For governance questions, reach out via [#toc](https://cloud-native.slack.com/archives/C0MP69YF4)
+
+## Code of Conduct
+
+All participants in the Environmental Sustainability TCG must adhere to the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/main/code-of-conduct.md). We are committed to providing a welcoming and inclusive environment for all community members.

docs/community/tcgs/index.md

@@ -30,7 +30,7 @@ Technical Community Groups enable the community to:
 
 ## Current TCGs
 
-The CNCF currently has three active Technical Community Groups:
+The CNCF currently has four active Technical Community Groups:
 
 ### Artificial Intelligence
 
@@ -42,6 +42,16 @@ Focused on artificial intelligence and machine learning in cloud native environm
 
 ---
 
+### Environmental Sustainability
+
+Continuing the work of the former TAG Environmental Sustainability, advocating for and developing environmental sustainability initiatives in cloud native technologies.
+
+**Topics**: Energy and carbon metrics, sustainability tooling (Kepler), Green Reviews, sustainability advocacy
+
+- [Learn more →](./environmental-sustainability/index.md)
+
+---
+
 ### Platform Engineering
 
 Dedicated to platform engineering practices, tools, and patterns that enable development teams to self-service their infrastructure needs while maintaining consistency and governance.