Global greenhouse gas emissions grew 2.3% year on year to reach 57.7 gigatons of CO2 equivalent in 2024, according to UNEP’s Emissions Gap Report published in November 2025. Limiting warming to 1.5 degrees Celsius requires those emissions to roughly halve by 2030 relative to 2019 levels.
Against that arithmetic, the Climate TRACE data released on May 28, 2026 showing global GHG emissions of 5.1 billion tonnes CO2 equivalent in March 2026, a decline of just 0.1% against March 2025, is a useful and uncomfortable baseline. It is not a crisis data point in isolation. It is, however, a precise illustration of the yawning distance between the pace of decarbonization currently underway and the trajectory required to meet any credible climate target.
Climate TRACE’s near-real-time emissions monitoring methodology, which uses satellite observation, machine learning, and asset-level data to produce monthly estimates without relying solely on national reporting, provides a granularity that annual inventories cannot. The March 2026 data reflects year-to-date global emissions of 15.2 billion tonnes CO2 equivalent for the first three months of 2026, 0.1% below the same period in 2025. At that annualized pace of reduction, the emissions trajectory remains far above the levels compatible with Paris Agreement temperature goals. A 1.5 degree Celsius compatible pathway requires global emissions to reach approximately 27 gigatons CO2 equivalent by 2030. Current policies, according to Climate Action Tracker, put the world on track for approximately double that amount.
The sectoral breakdown within the March 2026 data reveals where the structural pressures are concentrating. Power sector emissions increased 0.4% year on year to 1,330.8 million tonnes CO2 equivalent, making it the largest single emitting sector by volume in the month. That increase sits in tension with the headline narrative of accelerating renewable energy deployment globally. The explanation is not that renewables are failing to displace fossil generation; it is that electricity demand is growing faster than low-carbon generation capacity additions can absorb in aggregate. Buildings emissions rose 0.7% to 383.8 million tonnes CO2 equivalent, a figure consistent with seasonal heating demand variation but also reflective of the slow pace at which building stock decarbonization is proceeding globally. Manufacturing, by contrast, showed the largest sectoral improvement, falling 1.3% to 885.4 million tonnes CO2 equivalent, the most significant year-on-year change of any sector in the dataset.
The manufacturing decline warrants scrutiny before being interpreted as structural progress. The largest absolute emissions decreases among cities in March 2026 were recorded in Nanjing, Lanshan, and Anshan in China, all of which are major heavy industrial centers. The pattern of Chinese industrial city emissions declines aligns with documented overcapacity adjustments in China’s steel and cement sectors, where output reduction has been driven partly by domestic demand weakness rather than primarily by decarbonization investment. When the urban areas with the largest absolute emissions increases in the same period include Pohang-si in South Korea and Jamshedpur in India, both steel manufacturing hubs, a clearer picture emerges: steel sector emissions are shifting geographic distribution rather than declining at the system level.
The country-level data reinforces the complexity of interpreting aggregate progress. China’s March 2026 emissions declined 0.8% year on year, a reduction of 11.6 million tonnes CO2 equivalent, the largest absolute decline of any single country in the dataset. China accounts for approximately 1.5 billion of the 5.1 billion tonnes CO2 equivalent recorded globally in March 2026, meaning its trajectory dominates the global aggregate in a way that no other country approaches. The United States registered a 0.4% increase, adding 2.4 million tonnes CO2 equivalent year on year, while India declined 1.1%, reducing by 4.0 million tonnes CO2 equivalent. The Indian decline is proportionally the most significant among the top five emitters and is consistent with that country’s rapid renewable energy capacity additions, which saw non-fossil installed capacity cross 50% of total generation capacity in 2025, five years ahead of schedule.
Russia’s 0.3% decline of 0.9 million tonnes CO2 equivalent and Indonesia’s 0.2% increase of 0.3 million tonnes CO2 equivalent represent marginal movements that carry limited structural signal at monthly timescales. The EU’s aggregate 0.1% decline of 0.4 million tonnes CO2 equivalent is similarly modest, though it continues a multi-year trend of declining European emissions driven by coal phase-out and renewable growth. The fact that the EU as a bloc would rank fourth globally in emissions if treated as a single entity, while registering a decline smaller in absolute terms than India’s, reflects the different base effects at play: Europe’s emissions are declining from a lower starting point than it occupied a decade ago, while India’s larger recent reductions reflect both structural energy transition effects and potentially cyclical industrial output factors.
The methane data in the Climate TRACE release carries particular significance. Global methane emissions in March 2026 were 33.0 million tonnes CH4, unchanged from March 2025. Methane’s global warming potential over a 20-year timeframe is approximately 80 times that of CO2, making it a critical near-term lever for temperature trajectory management. The absence of any measurable change in methane emissions, despite the focus on fossil fuel methane reduction that has characterized international climate diplomacy since the Global Methane Pledge launched at COP26, reflects the challenge of driving behavioral and operational change across the distributed sources that dominate the methane budget, including agriculture at 586.1 million tonnes CO2 equivalent in March 2026, and fossil fuel operations at 784.6 million tonnes CO2 equivalent, both unchanged year on year.
The transportation sector’s 0.5% decline to 773.9 million tonnes CO2 equivalent is consistent with electric vehicle penetration effects in leading markets, but the scale of the reduction relative to the total underscores how slowly fleet electrification translates into aggregate emissions movement at the global level. With the global passenger vehicle fleet numbering over 1.4 billion vehicles, the current EV stock, while growing rapidly, displaces a fraction of total combustion miles traveled annually. The 0.5% decline in transportation emissions represents approximately 3.9 million tonnes CO2 equivalent, a figure that is meaningful in absolute terms but insignificant relative to the cumulative reduction trajectory required.
Current policies leave a 29 to 32 gigaton annual emissions gap relative to 1.5 degree compatible levels by 2030, and a 31 to 37 gigaton gap by 2035, according to Climate Action Tracker. UNEP’s Emissions Gap Report 2025 found that even full implementation of all current nationally determined contributions would reduce expected 2035 emissions by only about 15% compared to 2019 levels, against the 55% reduction required for 1.5 degree alignment. The March 2026 Climate TRACE data, read against that backdrop, confirms that the world is not currently on a trajectory that closes those gaps. A 0.1% year-on-year decline in monthly emissions, spread unevenly across sectors and heavily dependent on one country’s industrial output adjustments, is not a signal of accelerating decarbonization. It is a signal of the structural inertia that makes the gap between current trajectory and required pathway one of the defining policy challenges of this decade.
