G20 performance on climate change
G20 Summit

G20 performance on climate change

Climate change is a priority under Indonesia’s G20 leadership, but to date, performance in this area has been relatively weak. But shorter timelines and pre-summit meetings are among the measures that could help

The G20 Bali Summit prioritises climate change under its third priority of a sustainable energy transition, with a focus on climate finance and clean energy technology. G20 leaders can make advances in these areas at Bali. But to be effective, lead on climate and produce a successful summit they need to take a broader, more ambitious approach, despite unprecedented diversionary health and security shocks. A key step is for the Bali communiqué to recognise the many climate shocks happening around the world, which communiqués have not done in recent years. 


G20 summits have dedicated an average of 5% of their communiqués to climate change at each summit. This is much lower than the 34% average for the G20’s top issue of macroeconomic growth. But since the landmark Paris Agreement was signed in 2015, it has usually been above average on climate change, with a rising trend from 2018 to 2021. The 2018 Buenos Aires Summit gave 5% of its communiqués to climate change, rising to 10% at the 2019 Osaka Summit, 12% at the 2020 Riyadh Summit and then jumping to 31% at the 2021 Rome Summit. 


G20 commitment making mostly mirrors this trend. Since 2008, G20 summits have made 115 climate commitments – usually fewer than 10 per summit, with only four exceptions. Three exceptions came after the 2015 Paris Agreement was signed. The 2017 Hamburg Summit started this rising trend with 22 commitments (for 4% of its total). This plunged to three (3%) for Buenos Aires in 2018, rose to 13 (9%) for Osaka in 2019, plunged back to three (3%) for Riyadh in 2020 and finally rose again to 21 (9%) for Rome in 2021. 


The G20 Research Group has monitored G20 members’ compliance with 47 of these 115 climate commitments. Compliance is low, averaging only 67%. This is below the G20’s overall average of 71% across all subjects. Before the 2015 Paris Agreement, G20 climate compliance fluctuated wildly, reaching as low as 42% in 2013 and as high as 93% at 2009 for Pittsburgh. In recent years, compliance has levelled off and become more consistent. In 2015 compliance reached a high of 85%, boosted by the Paris Agreement that year, and stayed relatively high at 79% the following year at Hangzhou. Since then, compliance has remained in the 60%–70% range. Compliance for 2017 was 64%, 2018 was 71%, 2019 was 68%, and 2020 was 74%. By June 2022, compliance with the three assessed climate commitments from Rome was 73%. 

Causes and corrections

What accounts for these compliance scores? 

One factor is pre-summit meetings of environment ministers, which may help account for the more consistent climate compliance in recent years. Generally, summits with a pre-summit ministerial meeting have slightly higher compliance with the subject they govern. 

A second factor is timelines. Shorter is better. One monitored climate commitment has a multi-year timetable and has 43% compliance, the one with a one-year timetable has 50%, and the four with a timetable of six months or less average 85%.

A third factor is United Nations support. Commitments that explicitly support the UN Framework Convention on Climate Change or its agreements average 72%, compared to 65% for the ones that do not.

A fourth factor is links to related issues. Commitments on sustainable development average the highest compliance at 82%, compared to those without at 66%. 

A fifth factor is climate and diversionary shocks recognised in the communiqué. Although climate compliance has risen in the past two years despite the massive disruptions from Covid-19, neither the 2019 nor 2020 summits recognised climate change shocks (i.e., specific climate disasters). The 2019 Osaka Summit did not recognise any health shocks, but the 2020 Riyadh Summit made 38 such references. Despite this well-recognised Covid-19 shock, compared to none for climate shocks, climate compliance rose from 68% in 2019 to 74% in 2020. Yet health compliance from 2020 was significantly higher at 89%. 

At Bali, the G20 should add short-term timelines to its climate commitments, offer strong support to the UNFCCC, link its climate commitments with the UN’s Sustainable Development Goals, and, in the communiqué, recognise the many specific climate shocks happening around the world in the communiqué. India should consider holding an environment and climate change ministerial meeting early in its 2023 presidency to strengthen the work of Indonesia’s September ministerial, in addition to at least one more ministerial before the leaders’ next meeting.


Increased attention to climate change in recent years and the levelling off of G20 compliance with climate commitments point to greater institutional acceptance of the climate science and the increasingly visible real-world impacts of climate change among G20 members, regardless of their respective domestic political structures. 

This bodes well for the G20’s climate performance at Bali. But it remains to be seen if the G20 will overcome embedded structural resistance to transformative climate action and raise its ambition to the level urgently needed.