International efforts to combat climate change face significant hurdles, including fluctuating policy commitments and rising global temperatures. Despite these challenges, recent data indicates progress in reducing greenhouse gas emissions and accelerating the adoption of clean energy technologies, shifting the world away from the most extreme warming scenarios but still tracking towards dangerous temperature increases. This report examines the current state of climate action, driven by scientific data and national commitments under frameworks like the Paris Agreement.
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Key takeaways:
- Global temperatures reached critical levels, with 2024 confirmed as the hottest year on record.
- Despite rising emissions overall, some regions and countries are showing notable reductions.
- The world is currently tracking towards approximately 2.7°C of warming by 2100, a significant improvement from worst-case projections but still a level scientists warn carries substantial risks.
- Renewable energy sources are seeing rapid growth, signaling a shift in the global energy landscape.
Understanding the Climate Crisis
The Earth’s climate is warming primarily due to increased concentrations of greenhouse gases in the atmosphere, released by human activities since the start of the industrial era around 1850. Carbon dioxide (CO₂) is the most prominent of these gases, trapping heat and causing global temperatures to rise. Methane and nitrous oxide also contribute to this warming effect.
Fossil fuels are the primary source of these emissions. In 2023, energy-related CO₂ emissions came significantly from coal (41%), oil (32%), and natural gas (21%). The consequences are increasingly evident. The World Meteorological Organization confirmed 2024 as the hottest year on record, temporarily exceeding 1.5°C above pre-industrial levels. This period saw a rise in severe weather events globally, including intense heatwaves, widespread floods, and powerful cyclones.
Houses flooded after Cyclone Debby rainfallExtreme weather events, such as flooding pictured here after a cyclone, impacted many regions in 2024 as global temperatures rose.
Tracking Global Warming Scenarios
To assess potential climate futures, the Intergovernmental Panel on Climate Change (IPCC) uses Representative Concentration Pathways (RCPs). These scenarios model different levels of greenhouse gas concentrations based on varying levels of global climate action:
- RCP 2.6: Rapid climate action, low emissions, aiming for well under 2°C warming.
- RCP 4.5 and 6.0: Scenarios with some action and medium emissions.
- RCP 8.5: No significant action, high emissions, leading to substantial warming.
The Paris Agreement, established in late 2015, aims to limit global warming to well under 2°C, preferably 1.5°C, compared to pre-industrial levels. Achieving the 1.5°C target now appears highly challenging based on current emission trends.
However, the world is not following the worst-case RCP 8.5 scenario, which is now considered unlikely due to shifts in energy policies and technology. Current projections indicate the Earth is tracking towards a future between RCP 2.6 and 4.5, suggesting an average warming of about 2.7°C by 2100. While this level still represents a significant risk to ecosystems and human societies, it shows a deviation from the most catastrophic warming pathways.
Complementing the RCPs, IPCC experts developed Shared Socioeconomic Pathways (SSPs) that explore how social, economic, and political factors might influence climate mitigation and adaptation efforts. The world’s current trajectory aligns closest with a “middle of the road” SSP scenario characterized by uneven development and modest declines in resource intensity.
Research continues to refine these models. Initiatives like the One Earth Climate Model propose ambitious decarbonization pathways, requiring rapid shifts to clean energy and ending deforestation by 2050 to increase the likelihood of limiting warming closer to 1.5°C. Achieving such goals requires a collective global effort, considering historical emissions where countries like the US, EU, and China account for a large share of past emissions.
Emissions Trends and Progress
Despite increasing global energy demand, there are signs that greenhouse gas emissions may be approaching a peak. Significant growth in renewable energy capacity, advancements in battery storage, and the rise of electric vehicles are contributing to this shift.
Specific regional examples show progress:
- The European Union reported an 8.3% drop in emissions in 2023 compared to 2022. This puts the EU’s net emissions 37% below 1990 levels, while its GDP grew significantly over the same period. The EU remains on track for its goal of a 55% reduction by 2030.
- Australia’s emissions fell by 0.6% last year, placing the country 28.2% below its June 2005 baseline. This progress supports its Paris Agreement target of a 43% reduction by 2030.
- Emissions in the United States remain below pre-pandemic levels and approximately 20% below 2005 levels, continuing a downward trend since peaking in 2004. While the US is withdrawing from the Paris Agreement for the second time under the current administration, domestic emission trends have shown reductions driven by market forces and state-level policies.
- China, the world’s largest emitter, has shown recent progress, with a notable increase in renewable energy deployment leading to its first reported emissions drop. China accounts for nearly a third of global energy-related carbon emissions, making its actions critical for global targets.
The IPCC has stated that limiting warming to 1.5°C requires global emissions to peak before 2025. Recent analyses suggest this peak may occur this year.
The Path Forward
While the 1.5°C target remains highly ambitious and potentially out of reach based on current trends, significant shifts are underway in the global energy system. In 2024, renewables represented over 90% of new electricity generation capacity globally. Technologies like electric vehicles and heat pumps are becoming more competitive, and solar power continues rapid expansion.
The question is no longer solely whether the 1.5°C or even 2°C goal will be met, but how quickly the transition to a low-carbon economy can accelerate. Every fraction of a degree of warming avoided translates into fewer severe impacts, such as extreme weather events, food insecurity, and displacement. The technologies needed for decarbonization are becoming increasingly affordable and accessible. The speed of their deployment will determine the severity of future climate impacts.
For deeper insights into climate science, policy, and the energy transition, explore related articles on global temperatures, emission trends, and renewable energy adoption.
