# Overview | Cloud methodology
Source: https://greenpixie.com/docs/methodology/cloud

Methodology for Cloud Emission Measurement

Greenpixie's cloud methodology calculates energy, carbon, water, and embodied emissions metrics for public cloud service usage, at the granularity of individual units of cloud usage. The same metrics support enrichment of a client's cloud usage data, access through an API, and precomputed rate cards, across Amazon Web Services, Microsoft Azure, and Google Cloud Platform.

Per-token energy and carbon for cloud AI inference are covered by the companion [AI methodology](/methodology/ai).

Start with the [Introduction](/methodology/cloud/introduction), or jump to any section from the sidebar.

- [1. Introduction](https://greenpixie.com/docs/methodology/cloud/introduction): Purpose, audience, and context of the methodology.
- [2. Scope and Applicability](https://greenpixie.com/docs/methodology/cloud/scope-and-applicability): What is in scope, out of scope, and the evaluation boundary.
- [3. Definitions](https://greenpixie.com/docs/methodology/cloud/definitions): Key terms used throughout the methodology.
- [4. Methodology Overview](https://greenpixie.com/docs/methodology/cloud/methodology-overview): How the methodology works at a high level.
- [5. Inputs and Evidence Sources](https://greenpixie.com/docs/methodology/cloud/inputs-and-evidence-sources): The data categories and evidence sources the methodology draws on.
- [6. Eligibility, Selection, and Inclusion Logic](https://greenpixie.com/docs/methodology/cloud/eligibility-and-inclusion): What is included and how it is selected and mapped.
- [7. Assessment and Calculation](https://greenpixie.com/docs/methodology/cloud/assessment-and-calculation): The calculation components and their outputs.
- [8. Monitoring, Updates, and Review Timing](https://greenpixie.com/docs/methodology/cloud/monitoring-and-review): How the methodology is kept current.
- [9. Quality Assurance and Oversight](https://greenpixie.com/docs/methodology/cloud/quality-assurance): Standards alignment, validation, and review controls.
- [10. Governance and Methodology Changes](https://greenpixie.com/docs/methodology/cloud/governance): Working group, review cadence, and version control.
- [11. Outputs and Interpretation](https://greenpixie.com/docs/methodology/cloud/outputs-and-interpretation): Primary outputs, intended use, and interpretation guidance.
- [12. Related Documents](https://greenpixie.com/docs/methodology/cloud/related-documents): Standards, research, and sources referenced by the methodology.
- [13. Notice on Intellectual Property and Permitted Use](https://greenpixie.com/docs/methodology/cloud/intellectual-property): IP notice and permitted use of this document.