Fair-share contributions to near-term mitigation investment
Regional cost-effective investment needs for 2020–2030 come from IPCC AR6 WGIII (Technical Summary, Figure TS.25). The tool redistributes the global total across the ten WGIII regions using your weighting of responsibility, capability and need, and shows the within-region and inter-regional contributions that result. Method and data: Pachauri et al. (2022), Science.
Regional investment needs and 'fair-share' contributions, 2020–2030
Billion USD (PPP 2015) per year. Stacked bars split each region's fair-share contribution into within-region spending and inter-regional transfers; markers show AR6 cost-effective needs; the narrow grey bar shows recent average within-region investment.
Table
The same, as a share of regional GDP (2019)
Annual contributions divided by 2019 regional GDP (USD PPP 2017). Same colour coding as the first tab.
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Within-region and inter-regional flows
Annual contributions (billion USD PPP 2015) needed to align regional cost-effective needs with fair-share contributions. Regions on the left pay into within-region needs or an inter-regional fund; the fund pays out to regions whose needs exceed their fair share.
Selected indicators in original units
One panel per selected indicator. Greyed panels carry zero weight.
Corresponding indicator allocations
Each indicator transformed into a regional share of global investment needs (see paper SI for the transformation).
Weighted aggregate allocation
The weighted combination of the three indicator allocations — the shares that drive every other view.
Regions (IPCC WGIII R10):