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Climate Commitments of Subnational Actors and Business

A Qunatitative Assessment of their Emission Reduction Impact

image of Climate Commitments of Subnational Actors and Business

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.

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Overlap analysis

The calculations in the previous sections assume that the initiatives act in isolation from each other, but of course there are overlaps. For example, many companies with reduction commitments will be in cities covered by initiatives, and city and company reduction commitments may well be achieved in part through efficient lighting. In this section, we estimate the degree of overlap between initiatives in different sectors. It should be emphasised that the methodology chosen gives order of magnitude approximations for the degree of overlap and is not intended to be exhaustive. Overlaps within a sector are included in the relevant sections above.

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