Climate Commitments of Subnational Actors and Business

A Qunatitative Assessment of their Emission Reduction Impact

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This report present a quantitative assessment of the total greenhouse gas (GHG) emissions mitigation impact in 2020 of current non-state climate action. Its focus is initiatives with the potential to be large scale. The report predicts that over the next few years, new targets for the post 2020 period will be agreed by existing and new members of initiatives. Thus any quantification now for post 2020 would likely lead to an underestimate of the contribution from initiatives. The total calculated impact represents the GHG emission reduction and takes into account overlaps between initiatives. It also estimates to what extent the emission reductions are additional to those achieved through climate action of national governments.



Specific methodologies and assumptions for the quantification of the selected initiatives

The effect of company initiatives was quantified based on the individual targets of the companies. Quantifying the effect of every company initiative individually was not possible within the timescale of this study, so we took an approach in which we randomly selected 50 companies and used their weighted average emission reductions in 2020, compared to BAU, as representative of the achievement of all companies in the initiatives. For the randomly selected 50 companies, we based BAU on the emissions from the year in which the commitment was made. These emissions were not available for the full list of companies, so when applying the weighted average emission reductions, we used 2013 GHG emissions to calculate business-as-usual.


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