Climate Equity Reference Calculator

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Global mitigation pathway:
Responsibility
- Cumulative since:
- Include non-CO₂ gases
- Include land-use emissions
- Include emissions embodied in trade
- Responsibility weight:
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 applies recent improvements of carbon intensity to GDP forecast estimates. GDP estimates based on national data from the IMF's Worls Economic Outlook (WEO)for the next 5 years and then on regional data from IPCC (Fifth Assessment Report) through 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 2021 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%
Averagge 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--7mjG4N)
Calculator version: 3.0.1 (engine); 3.2.0 (cerc-web)