Updated September 2026
Transparency

Sources & methodology.

Every figure published on ClimateZero traces back to a named, public source. This page lists where the core datasets come from, explains how the two original indices on this site are built, and links to the full dataset for anyone who wants to check the numbers themselves.

Primary data sources

Full country dataset

Every figure behind the map, country pages and Justice Gap index, in one CSV file.

Download CSV
Original analysis on this site

Two things we built ourselves.

The Climate Justice Gap index

An original composite score, historical emissions share minus estimated GDP loss from climate impacts, ranking countries by the gap between contribution and consequence. Full formula and caveats on the Justice Gap page.

The Loss & Damage tracker

A compiled, cross-referenced record of what has been pledged, transferred and disbursed through the UN Loss and Damage Fund, drawn from independent financial and climate journalism rather than a single press release. See the tracker page.

Our standard

What we do, and do not, publish.

Every number on this site is sourced from a named organisation, with a link to that source shown alongside it wherever it appears. Where figures from different sources conflict, we show the range rather than picking a single number to look tidy. Where we could not find a reliable figure for a particular country or statistic, that gap is shown honestly as "no data published" rather than filled in with an estimate. This matters more to us than having a complete-looking table: a site that quietly invents numbers to avoid gaps is not one anyone should trust, least of all on a subject where the stakes are this high.

If you spot a figure that looks wrong, out of date, or a source that has updated, get in touch and we will correct it.