> For the complete documentation index, see [llms.txt](https://docs.rainbowstandard.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rainbowstandard.io/rainbow-standard-documents/methodologies.md).

# Methodologies

The available methodologies and modules for use under the Rainbow Standard are listed below, with links to the respective methodology document.

## Rainbow Methodologies

Each methodology gives specific requirements and quantification methods per project types.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td>Biogas from anaerobic digestion</td><td></td><td></td><td><a href="/pages/obRdXsWwQ3QKd33cPfRG">/pages/obRdXsWwQ3QKd33cPfRG</a></td><td><a href="/files/q6E23xtpYegumN0r1WTp">/files/q6E23xtpYegumN0r1WTp</a></td></tr><tr><td>Biomass carbon removal and storage (BiCRS)</td><td></td><td></td><td><a href="/pages/Jy6o8q5Q31d2U0OK7Yuo">/pages/Jy6o8q5Q31d2U0OK7Yuo</a></td><td><a href="/files/4B3R2CjT9hA3bBYbzz1a">/files/4B3R2CjT9hA3bBYbzz1a</a></td></tr><tr><td>Refurbishing of electronic devices</td><td></td><td></td><td><a href="/pages/rqZzogSgVlIRAB55Oki1">/pages/rqZzogSgVlIRAB55Oki1</a></td><td><a href="/files/ZAxqYlP50vM4pzsvknrg">/files/ZAxqYlP50vM4pzsvknrg</a></td></tr><tr><td>Biobased construction materials</td><td></td><td></td><td><a href="/pages/RqfJGxwJIa5eql8owuF4">/pages/RqfJGxwJIa5eql8owuF4</a></td><td><a href="/files/f5cKAncYBa43GiMMU7HB">/files/f5cKAncYBa43GiMMU7HB</a></td></tr><tr><td>Battery second life</td><td></td><td></td><td><a href="/pages/h2OzRlsij4Sb7h6ufm2X">/pages/h2OzRlsij4Sb7h6ufm2X</a></td><td><a href="/files/eoFyTVMVVZVZgcowt7cX">/files/eoFyTVMVVZVZgcowt7cX</a></td></tr><tr><td>Mineralization of alkaline materials (ex situ)</td><td></td><td></td><td><a href="/pages/dWUzpkT7ZGzmw6bBk7m4">/pages/dWUzpkT7ZGzmw6bBk7m4</a></td><td><a href="/files/msi0QQdy9fGE46fIQeou">/files/msi0QQdy9fGE46fIQeou</a></td></tr><tr><td>Enhanced rock weathering</td><td></td><td></td><td><a href="/pages/IzD2vrA9ezW0AapQTp1l">/pages/IzD2vrA9ezW0AapQTp1l</a></td><td><a href="/files/UF1GBglM39hR3jIMKvUW">/files/UF1GBglM39hR3jIMKvUW</a></td></tr></tbody></table>

## Rainbow modules

General Rainbow modules cover parts of project life cycles that are repeated across many technology types and methodologies. They contain basic eligibility requirements and GHG quantification approaches, and are combined with Rainbow methodologies when needed.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>Transportation</td><td><a href="/files/XAxrYlLSh0qtvbDkKkqp">/files/XAxrYlLSh0qtvbDkKkqp</a></td><td><a href="/pages/VTWdCc7guKu1x0azAizi">/pages/VTWdCc7guKu1x0azAizi</a></td></tr><tr><td>Processing and energy use</td><td><a href="/files/xqDoBuMbX7fcBqJ8AanC">/files/xqDoBuMbX7fcBqJ8AanC</a></td><td><a href="/pages/BTxxPIM3a4Nai1Wkwu2Y">/pages/BTxxPIM3a4Nai1Wkwu2Y</a></td></tr><tr><td>Infrastructure and machinery</td><td><a href="/files/gE6Zo8o6awA0p9LnSTnF">/files/gE6Zo8o6awA0p9LnSTnF</a></td><td><a href="/pages/IwqpSqlee22qTIPti3Sl">/pages/IwqpSqlee22qTIPti3Sl</a></td></tr><tr><td>Energy co-products</td><td><a href="/files/CxuE4U5JkYE63biLhW6k">/files/CxuE4U5JkYE63biLhW6k</a></td><td><a href="/pages/5o87C1B9WEcsBRQuyYwi">/pages/5o87C1B9WEcsBRQuyYwi</a></td></tr></tbody></table>


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