Industry Reports
December 6, 2023

Analysis of the IEA’s “CO2 emissions in 2022” report

IEA's 2022 CO2 report reveals rising emissions at 36.8 Gt, stresses clean tech impact, decoupling from economy, and urgent coal transition.


The year 2022 marked a crucial milestone in the ongoing battle against climate change, as global carbon dioxide (CO2) emissions from energy combustion and industrial processes reached a new high of 36.8 gigatons (Gt). This report delves into the intricacies of the International Energy Agency's (IEA) comprehensive assessment of energy-related greenhouse gas emissions during 2022.

In this industry report, we will analyse and dissect the key findings of the IEA's report on CO2 emissions in 2022, shedding light on the contributing factors, regional disparities, shifts in energy sources, and the impact of clean energy technologies. Additionally, we will explore the implications of these findings and offer our insights into the path forward.

Global Emissions Overview

The IEA's report on CO2 emissions in 2022 reveals a nuanced picture of global emissions trends. Contrary to the initial fears, global energy-related CO2 emissions increased by 0.9% or 321 million tons, reaching a record 36.8 Gt. This growth, while significant, was notably slower than the 6% rebound observed in 2021. These figures were shaped by a confluence of factors, and understanding them is crucial for formulating effective climate action strategies.

Decoupling of Emissions and Economic Growth

One of the standout features of 2022 was the reversion to a long-standing trend of decoupling emissions from economic growth, which had been broken in 2021. Despite the global GDP growing by 3.2%, CO2 emissions were not in lockstep. This divergence highlights the potential for sustainable economic growth with reduced environmental impacts. The challenge now is to maintain and strengthen this decoupling trend, making it a cornerstone of our climate efforts.

Impact of Clean Energy Technologies

The growth of clean energy technologies played a pivotal role in mitigating CO2 emissions. Increased deployment of renewables, electric vehicles, and heat pumps prevented an additional 550 Mt in CO2 emissions. It's a testament to the effectiveness of these technologies in the fight against climate change.

In particular, the rapid expansion of solar PV and wind generation, both setting new annual records with increases of around 275 terawatt-hours (TWh), limited the rebound in coal power emissions. Renewables met 90% of global growth in electricity generation, a remarkable achievement. The growth of clean energy not only reduces emissions but also enhances energy security and resilience.

Energy-Related Methane and Nitrous Oxide Emissions

The report also underscores the importance of addressing methane and nitrous oxide emissions. In 2022, methane emissions reached nearly 135 million tons or about 4 Gt of CO2-equivalent, largely coming from onshore oil and gas operations and steam coal production. As natural gas remains a significant part of the energy mix, mitigating methane emissions is an essential element of emissions reduction.

Regional Disparities

Emissions growth varied significantly among regions, with Asia's emerging markets and developing economies (excluding China) experiencing the highest increase, rising by 4.2% or 206 million tons of CO2. These disparities underscore the need for coordinated global efforts to address climate change. Additionally, the report outlines regional trends in the United States, the European Union, and China.

Sectoral Changes

Understanding sectoral changes in emissions is vital for tailoring mitigation strategies. The IEA's report offers valuable insights into emissions across sectors, revealing opportunities and challenges.

Electricity and Heat Generation

Electricity and heat generation experienced the most significant increase in emissions in 2022, rising by 1.8% or 261 million tons. This surge was largely attributed to coal-fired power generation, which grew by 2.1%. The prominence of coal in the energy mix in emerging economies in Asia was a driving force. However, coal use could have been even more substantial if it weren't for the substantial growth in renewables.

Renewables, particularly solar PV and wind generation, played a pivotal role in limiting the growth of coal power emissions. These technologies met 90% of the global growth in electricity generation, showcasing their potential as effective solutions for emissions reduction. Solar PV and wind generation, both achieving around 275 TWh increases, exceeded expectations and proved to be resilient and powerful contributors to emissions mitigation.

Industry Emissions

Emissions from the industrial sector declined by 1.7% in 2022, totalling 9.2 Gt. While several regions witnessed manufacturing curtailments, the global decline was primarily driven by a 161 million-ton decrease in China's industrial emissions. This decline was closely linked to a 10% drop in cement production and a 2% reduction in steelmaking. The report highlights the importance of reducing emissions from energy-intensive industries.

Buildings Sector

Emissions from the buildings sector also decreased in 2022, helped by a mild winter. Particularly noteworthy was the 60 million-ton reduction in the European Union, achieved through energy conservation measures, fuel switching, and changes in behaviour. The rise in heat pump sales, reaching 2.8 million, underscores the potential of energy-efficient technologies in emissions reduction. The building sector's performance exemplifies the critical role that behavioural changes, technology adoption, and policy measures can play in curbing emissions.

Energy Source Contributions

The choice of energy sources significantly influences emissions, and the report highlights how different sources contributed to the overall emissions in 2022.


Emissions from coal grew by 243 million tons to reach a new all-time high of nearly 15.5 Gt. This 1.6% increase was faster than the 0.4% annual average growth observed over the past decade. The shift from gas to coal during the global energy crisis was a significant driver of this growth. This trend highlights the urgent need for transitioning away from coal and reducing our dependence on it.


Emissions from oil increased by 2.5% or 268 million tons in 2022. Notably, around half of this increase was attributed to aviation, as air travel continued its recovery from pandemic lows. Despite this growth, the rise of electric vehicles, with over 10 million cars sold in 2022 (exceeding 14% of global car sales), demonstrated a positive trend toward reducing emissions from the transport sector.

Regional Highlights


China's emissions remained relatively flat in 2022, declining by 0.2%. The decline can be attributed to a combination of factors, including weaker economic growth, declining construction activity, and strict COVID-19 measures that led to reductions in industrial and transport emissions. It is essential to note that China's emissions decreased by 23 million tons, entirely due to increased coal consumption. Despite growth in coal power capacity and domestic production, coal did not fully keep pace with demand due to increased solar PV and wind generation.

European Union

Despite market disruptions and hydro shortfalls due to drought, the European Union managed to reduce its emissions by 2.5% or 70 million tons in 2022. This achievement can be attributed to a combination of factors, including a mild winter, effective energy conservation measures, fuel switching, and behavioural changes. The decrease in building sector emissions, enabled by exceptionally mild weather, highlighted the impact of climate-conscious choices.

 United States

In contrast to the global trend of decreasing

 natural gas use, the United States saw an increase of 89 million tons in CO2 emissions from gas. This rise was driven by the need to meet peak electricity demand during summer heatwaves. The growth in the buildings sector, mainly due to extreme temperatures, was a contributing factor. However, power sector emissions decreased by 20 million tons, thanks to the rise of solar PV and wind generation, which prevented further coal use.

Implications and Insights

The Role of Clean Energy Technologies

The report underscores the crucial role that clean energy technologies play in mitigating emissions. The substantial growth in solar PV and wind generation, coupled with the increasing adoption of electric vehicles, demonstrates the positive impact of technological innovation in decoupling economic growth from emissions.

Investments in clean energy technologies, as evident in the global green spending component of stimulus packages, are proving to be instrumental in controlling emissions growth. The IEA's Government Energy Spending Tracker reported that between April 2020 and October 2022, governments worldwide committed over USD 1.2 trillion to support clean energy investments. This significant financial commitment is more than double the investments made after the 2008 global financial crisis.

Regional Disparities and Collaboration

The report highlights stark regional disparities in emissions growth, with Asia's emerging markets and developing economies experiencing the highest increase. This emphasises the need for enhanced global collaboration to address climate change effectively. International efforts, such as those outlined in the Paris Agreement, should be reinforced to ensure a coordinated and collective response.

The Urgency of Transitioning Away from Coal

The continued growth in emissions from coal is a cause for concern, particularly as it exceeds the average growth rate observed over the past decade. Urgent action is needed to accelerate the transition away from coal and promote cleaner alternatives. The success stories of regions that managed to limit emissions growth through the expansion of renewables should serve as models for others.

The Methane Challenge

While the report primarily focuses on CO2 emissions, the rising levels of methane emissions warrant attention. Given the high global warming potential of methane, concerted efforts are needed to address leaks and venting, particularly from oil and gas operations. This emphasises the importance of a holistic approach to emissions reduction that includes both CO2 and non-CO2 greenhouse gases.


The IEA's report on CO2 emissions in 2022 provides a comprehensive and illuminating view of the current state of global emissions. While challenges persist, the report offers valuable insights into the opportunities and successes that can guide our collective efforts toward a sustainable and resilient future.

The findings of this report underscore the importance of accelerating the transition to cleaner energy sources, embracing innovative technologies, and fostering international collaboration. The lessons learned from 2022 should serve as a roadmap for informed decision-making, with a focus on achieving a balance between economic prosperity and environmental sustainability. The urgency of the climate crisis demands swift and decisive action, and this report serves as a vital resource for shaping a resilient and low-carbon future.

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