2025 climate report reveals accelerating clean energy investments but persistent emissions gap

Planet-warming greenhouse gas emissions continued to rise in 2025 even as investment, technology and new financial instruments accelerated the shift away from fossil fuels , a picture of uneven progress that leaves industrial decarbonisation both closer and farther from its targets than many policymakers had hoped.

According to the report by Bloomberg, global investment in the clean energy transition, spanning wind, solar, batteries and grids, is expected to have reached $2.2 trillion in 2025. The International Energy Agency projects overall global energy investment at a record $3.3 trillion the same year, with $2.2 trillion channelled into clean energy technologies and the remainder split across fossil fuel spending and power networks, underscoring a structural reallocation of capital towards low-carbon systems. Industry data shows solar was the single biggest beneficiary, with investment forecast to reach roughly $450 billion in 2025, while battery storage spending surged substantially. (Bloomberg; IEA)

The scale and speed of deployment were striking. Renewable power capacity rose to new highs and, according to the Ember think tank, solar and wind met all new global electricity demand in the first three quarters of 2025, putting the sector on track for an 11% year‑on‑year increase in capacity. Over the past three years renewables expanded by nearly 30% on average , progress that, in the view of many analysts, brings the world within reach of the COP28 goal to triple clean power by 2030 if current trends continue. (Bloomberg; Ember)

China’s role was central to that expansion. Reporting by Le Monde and Bloomberg indicates China delivered the bulk of new global capacity in 2025, accounting for roughly two thirds of new solar and nearly 70% of new wind additions. A combination of its large domestic market, manufacturing scale and policy choices has effectively built much of the industrial spine for the global energy transition. (Le Monde)

Yet wider policy and emissions trajectories tell a different story. The OECD Climate Action Monitor 2025 finds greenhouse gas emissions across 50 OECD and partner countries were about 8% above levels consistent with their 2030 Nationally Determined Contributions, and policy stringency increased only marginally in 2024 , signalling a loss of momentum since 2022. Reporting by Le Monde also notes that, a decade after the Paris Agreement, global emissions remain higher than desired and the 1.5°C threshold is effectively out of reach without major CO2 removal. The contrast between surging clean investment and inadequate emissions pathways highlights a persistent implementation gap. (OECD; Le Monde)

Technological and market dynamics are reinforcing each other. Battery prices continued to fall, with BloombergNEF estimating a record low of about $108 per kilowatt-hour in 2025 and further modest declines forecast. That compression improves the economics of electric vehicles and utility-scale storage , the latter described by the U.S. Energy Information Administration as responsible for a material share of new capacity in 2025 , and strengthens the case for electrifying industrial heat and transport. (BloombergNEF; U.S. EIA)

Artificial intelligence and the rapid expansion of data centres added a new commercial driver for decarbonisation. Data‑centre investment reached record levels in 2025, boosting demand for reliable, low‑carbon power and grid upgrades. At the same time, AI tools are being deployed to optimise operations, monitor infrastructure and accelerate climate science, from optimising routes for electrified fleets to remote sensing of emissions. Independent satellite operators are also improving methane detection at facility level, exposing concentrated leaks from oil, gas and coal operations and creating new commercial and regulatory pressure to abate one of the most potent short‑lived greenhouse gases. (ITPro; Space.com)

This year also saw advances on governance and adaptation. The High Seas Treaty crossed the ratification threshold to enter into force in January 2026, establishing a framework for marine protected areas and environmental assessments on the 60% of the ocean beyond national jurisdiction , a development that climate and ocean policy experts say could constrain harmful activity in international waters. The International Court of Justice issued an advisory opinion affirming that states risk contravening international law if they fail to pursue efforts consistent with the 1.5°C goal, a ruling that advocates expect to use to press governments for stronger action. (Bloomberg; reporting)

Adaptation finance and risk transfer instruments made headlines. Donor commitments and philanthropic pledges accelerated, with new pledges aimed at tripling adaptation finance to $120 billion per year by 2035 and private foundations earmarking substantial sums for resilience in vulnerable regions. Catastrophe bonds and other insurance-linked securities expanded their remit beyond pure loss replacement: Jamaica’s $150 million cat bond triggered by Hurricane Melissa provided a high‑profile, full payout that eased an immediate fiscal burden, while North Carolina issued a novel bond structure this year that ties payouts to resilience investments , returning unspent capital to fund “super roofs” that lower future exposure and insurance claims. The North Carolina issuance drew roughly $600 million in investor interest and illustrates how capital markets are beginning to design incentives for adaptation as well as compensation. (Bloomberg)

Despite these advances, the disconnect between where capital flows and where emissions must fall remains material. “Is this enough to keep us safe? No it clearly isn’t,” Gareth Redmond‑King, international lead at the Energy and Climate Intelligence Unit, said. “Is it remarkable progress compared to where we were headed? Clearly it is.” That assessment captures the current paradox for industrial decarbonisation: technology, finance and capacity additions are accelerating, but near‑term policy and implementation fall short of the reductions required to limit warming to safe levels. (Bloomberg; ECIU)

For businesses and policymakers focused on decarbonising heavy industry, the implications are clear. The continuing decline in capital and operating costs for clean technologies, the growing availability of grid‑scale storage, improved emissions monitoring and novel risk‑transfer products together lower the technical and financial barriers to deep emissions cuts. However, bridging the gap between investment trends and emissions outcomes will require clearer regulatory frameworks, faster permitting for clean infrastructure, strengthened methane controls, and targeted public finance to derisk large industrial transitions where private capital remains hesitant.

In short, 2025 was a year of momentum and warning: markets and technology are shifting the map of possibility for decarbonisation, but without stronger policy alignment and implementation the world will struggle to translate that potential into the emissions reductions needed to avoid catastrophic climate outcomes.