Climate Equity Reference Calculator

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Global mitigation pathway:
Responsibility
- Cumulative since:
- Include land-use emissions
- Include non-CO₂ gases
- Include emissions embodied in trade
Progressivity
- Development threshold ($PPP):
- Progressive between thresholds
- Luxury threshold ($MER):
- Multiplier on incomes above the luxury threshold:
- Emissions elasticity:
- Show illustrative "tax table"
Incremental costs of climate action
- Mitigation cost as % GWP:
  Assuming a total global mitigation cost of $1,188 billion (1.0% of GWP), this yields a global average incremental mitigation cost of $33 per tonne CO₂e in 2030.
- Adaptation cost as % GWP:
Kyoto obligations
- Include Kyoto obligations
- Exclude Kyoto obligations
- Exclude for only US & Canada
Mitigation smoothing
- Average the mitigation-period RCI

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Use the controls to the left to change the parameter values and see the implications for national fair shares.

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Global mitigation pathway: 1.5℃ LED pathway	Responsibility weight: 0.5	Development threshold: $7,500
Progressive between thresholds: no
Include land-use emissions: no	Include non-CO₂ gases: yes	Include emiss. embodied in trade: no
Cumulative since: 1950	Mitigation cost as % GWP: 1.0%	Adaptation cost as % GWP: 1.0%
Use mitigation smoothing: yes	Kyoto adjustment: none	Emissions elasticity: 1.0

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Baseline Emissions: GHG emissions baselines (these are *not* business-as-usual pathways) are calculated as counter-factual non-policy baselines. The method is convergence from recent historical growth rates to long-term (2030) growth rates from the projections of McKinsey and Co. (Version 2.1). CO₂ from land use is projected constant at at levels equal to the average of the last 10 years of historical data. GDP estimates are taken from IMF (WEO2013) through 2018 and converge to growth rates from McKinsey and Co. in 2030. See Definition, sourcing, and updating of the emissions baselines for details.
"Fair share" allocation: National allocation trajectory, as calculated for World using the specified pathways and parameters. The mitigation implied by this allocation can be either domestic or international – The Climate Equity Reference Project effort-sharing framework says nothing about how or where it occurs.

Fair shares
World baseline emissions , projected to 2030		61,459 MtCO₂e
Global mitigation requirement below global baseline, projected to 2030	(A)	36,220 MtCO₂e
World share of global Responsibility Capacity Index in 2019 to 2030 period	(B)	100%
World mitigation fair share, projected to 2030	(A × B)
as tonnes below baseline		36,220 MtCO₂e
as tonnes per capita below baseline		4.2 tCO₂e/cap
as percent below baseline		59%
Per capita fair share of global costs, expressed in financial terms
Mitigation costs (assuming incremental global mitigation costs = 1.0% of GWP)		$139
Adaptation cost (assuming global adaptation costs = 1.0% of GWP)		$139

World 1990 emissions		31,836 MtCO₂e
World emissions allocation, projected to 2030
as tonnes		25,239 MtCO₂e
as tonnes per capita		3.0 tCO₂e/cap
as percent of 1990 emissions		79%
as percent below 1990 emissions		21%

Data version: 7.2.0 (last change to database: 18 Oct 2018 12:00:00 PDT, fw-sql3--tjvlOa)
Calculator version: 3.0.1 (engine); 3.2.0 (cerc-web)

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