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Browse publications
Climate Action Tracker briefing: three key near-term actions could bring projected warming below 2˚C
Publication date 19 Nov 2025

This analysis shows that tripling renewables, doubling energy efficiency and cutting methane by 2030 and beyond would cut warming rate by a third in ten years, and halve it by 2040.

Climate Change Performance Index 2026
Publication date 18 Nov 2025

Each year, the Climate Change Performance Index (CCPI), co-published by Germanwatch, NewClimate Institute and CAN International, assesses the progress made by the largest emitters. The CCPI 2026 paints the same ambivalent picture seen in recent editions.

Climate Action Tracker Briefing: little change in warming outlook
Publication date 13 Nov 2025

Ten years after the Paris Agreement, Climate Action Tracker’s warming projections show little to no measurable progress for the fourth consecutive year.

The Emissions Gap Report 2025
Publication date 04 Nov 2025

This is the 2025 edition of the UNEP Emissions Gap Report, which tracks progress in limiting global warming well below 2°C and pursuing 1.5°C in line with the Paris Agreement.

Climate Action Tracker's mid-year check on 2035 climate plans
Publication date 19 Jun 2025

To support governments in raising ambition ahead of COP30, the CAT has produced seven country-focused reports: six on major emitters that have not yet submitted updated NDCs (China, India, the European Union, Indonesia, South Africa, and Australia) and one on the COP30 host country, Brazil

The bridge to net zero matters more than the destination
Publication date 13 Dec 2024

This report estimates how 20 countries plan to meet net-zero targets, revealing significant residual emissions and misalignment with short-term policies. It highlights the reliance on carbon removal and emphasizes the need for faster emissions reductions and credible strategies to close the gap.

Climate Change Performance Index 2025
Publication date 20 Nov 2024

The Climate Change Performance Index monitors climate mitigation progress of 63 countries and the European Union, together responsible for more than 90% of global emissions.

Climate Action Tracker Briefing: As the climate crisis worsens, the warming outlook stagnates
Publication date 14 Nov 2024

Despite an escalating climate crisis marked by unprecedented wildfires, storms, floods, and droughts, our annual global temperature update shows global warming projections for 2100 are flatlining, with no improvement since 2021. The aggregate effect of current policies set the world on a path toward 2.7°C of warming.

The Emissions Gap Report 2024
Publication date 24 Oct 2024

This is the 2024 edition of the United Nations Environment Programme (UNEP) Emissions Gap Report series, which tracks our progress in limiting global warming well below 2°C and pursuing 1.5°C in line with the Paris Agreement.

Methodology Underpinning the State of Climate Action Series: 2024 Update
Publication date 21 Oct 2024

This technical note describes the State of Climate Action series’ methodology for identifying sectors that must transform, translating these transformations into global mitigation targets primarily for 2030, 2035 and 2050 and selecting indicators with datasets to monitor annual change.

Wie ausbleibender Klimaschutz im Verkehr künftige Generationen belastet
Publication date 12 Sep 2024

Deutschland und der Verkehrssektor in Deutschland insbesondere hinken beim Klimaschutz hinterher. Je länger Reduktionen verzögert werden, desto dringender und disruptiver werden die Maßnahmen, wenn gesetzte Ziele immer noch erreicht werden sollen.

The Climate Action Tracker's guide to a good 2035 climate target
Publication date 10 Jun 2024

The CAT released its "Guide to a good 2035 target" at the climate talks in Bonn, Germany today, setting out a detailed, four-point recipe of key elements governments need to include in their next round of climate targets (Nationally Determined Contributions or NDCs), to be submitted to the UNFCCC from November this year.

Climate policy in 2023
Publication date 04 Apr 2024

National and international climate policy advances in many areas but also faces substantial domestic hurdles in others. In this publication, we outline critical national and international climate policy developments from 2023.

Climate Action Tracker Briefing: COP28 initiatives will only reduce emissions if followed through
Publication date 09 Dec 2023

We estimate that of the total emissions savings that could be achieved by the pledges, around a quarter is already included in government NDCs, around a quarter is additional and achievable, and around half is unlikely to be achieved without further action to improve the initiatives.

Climate Change Performance Index 2024
Publication date 08 Dec 2023

The Climate Change Performance Index monitors climate mitigation progress of 63 countries and the European Union, together responsible for more than 90% of global emissions.

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