Climate Equity Reference Calculator

Basic Equity Settings

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Introduction to the Climate Equity Reference Calculator
For first time users of the Climate Equity Reference Calculator, we recommend first learning about our effort-sharing approach to better understand the significance of the settings they can make below.
Level of Global Ambition
Select a mitigation pathway:
- 1.5°C Low Energy Demand (No BECCS, minimal overshoot of 1.5°C, nearly 66% chance of 1.5°C in 2100)
- 1.5°C Standard ("Greater than or equal to 50% chance of staying below 1.5°C in 2100.")
- 2°C Standard ("Greater than 66% chance of staying within 2°C in 2100.")
Common but Differentiated Responsibilities and Capabilities
Historical Responsibility, calculated based on emissions cumulative since:
- 1850
- 1950
- 1990
Capability to Act, calculated in increasingly economically progressive ways:
- No development threshold (actually, a regressive approach)
- $7,500 development threshold
- $7,500 development threshold, plus additional progressivity factors
Less progressive
Earlier responsibility start date
Later responsibility start date
More progressive
Relative Weight for Historical Responsibility vs Economic Capability to Act

Responsibility

Capability

Select regions and countries

Display settings

Calculator settings

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

Available Countries:

Selected Countries:

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

The calculator or database has been updated since you last visited. Your settings have been reset.

Show settings
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

Show graph key

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--zkVrsJ)
Calculator version: 3.0.1 (engine); 3.2.0 (cerc-web)