1. Country

2. Global warming choices

(a) The limit to global warming:

°C

(b) Confidence in meeting this limit:

3. Accounting choices

(a) or emissions from imports & exports. (b) or emissions from aviation. (c) or equity between nations, i.e. the provision specified in the Paris Agreement.

4. Select pathways to display

A. Compliant pathways of CO2 emission reduction:

Compliant linear decline in emissions (emissions fall steadily to zero fast enough to comply with the CO2 budget)

Compliant exponential decline in emissions (emissions fall exponentially, i.e. with a constant halving time, fast enough to comply with the CO2 budget)

B. Specified pathways. The calculator assesses whether they are complaint with the CO2 budget.

Linear Net Zero 2050 (net emissions fall steadily to zero in 2050)

Linear Net Zero 2040 (net emissions fall steadily to zero in 2040)

Table. Pathways of emission cuts. All figures are tonnes CO2 per person

Notes and sources

Global CO2 budgets The figures for the global CO2 budget are taken from Table 5.8 (p753) of the AR6 WG1 report produced by the IPCC in 2021 - at report.ipcc.ch/ar6/wg1/IPCC_AR6_WGI_FullReport.pdf. Climate deaths The figures for climate deaths are calculated on the basis of 1 death per 4000 tonnes CO2 emitted - see carbonindependent.org/144.html. Equity between nations There is a provision in the Paris Agreement for equity between nations, but this is rarely mentioned in high emission countries - see carbonindependent.org/122.html. Greenhouse gas emissions other than CO2 This calculator considers only CO2 emissions, and not other greenhouse gases such as methane and nitrous oxides. This is because these other gases are relatively short-lived in the atmosphere, e.g. methane lasts for about a decade, whereas CO2 persists for hundreds or thousands of years.

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Charts can be downloaded free of copyright (right-click on the chart). This web page can be printed out as a factsheet. First published 16 Oct 2023
Last updated 7 Dec 2023