logo text

GHG Abatement Cost MOdel (GACMO)

 GHG Abatement Cost MOdel (GACMO)

The GACMO (Greenhouse Gas Abatement Cost Model) is a greenhouse gas emissions projections tool developed over more than twenty years by the UNEP Copenhagen Climate Centre. It allows countries to carry out rapid but accurate scenario analysis of how a variety of mitigation options across different economic sectors impact emissions, thereby increasing transparency and contributing to informed decision making.

The tool can provide valuable input for preparing and updating NDCs by identifying NDC targets for emissions reductions and by providing assessments of future emissions in different climate action scenarios.

It can also help reporting through the biennial transparency reports (BTRs) under the Paris Agreement.

A new version of GACMO has been developed with support from ICAT and is now available. The new version follows the same methodological approach, but has a user-friendly step-by-step improved interface, and comes with detailed guidance and two video tutorials.

Get started with GACMO

Tutorial Videos

The tutorial videos above have subtitles in English, French and Spanish. To activate them, please click on the settings button, on the right side of the cc button, and select the subtitle language of your choice. 



If you would like to know more about GACMO or for any technical support issues, please contact ICAT’s Implementing Partner, UNEP-CCC.

Learn more

About other ICAT tools and methodologies