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Contributor
Daniel Wetzel
Head of Tracking Sustainable Transitions Unit. Daniel Wetzel leads the newly created Tracking Sustainable Transitions unit within the World Energy Outlook, which tracks how policy measures are actually moving the needle on clean energy transitions, energy access, and energy employment. He was one of the lead author’s on the IEA’s Sustainable Recovery report, the IEA’s Sustainable Recovery Tracker, and coordinated IEA’s co-custodianship on Tracking Progress on Sustainable Development Goal 7.1: Universal Access. Daniel also oversees the employment and parts of the demand analysis in the annual World Energy Outlook. Prior to joining the IEA, Daniel worked at the Rocky Mountain Institute in their Beijing office, leading their Power Market Reform program, and also in Colorado, working on regional energy transition plans.
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Policy report
Jun 2025
Gaining an Edge Unlocking the potential of energy efficiency
Efficiency opportunities at the firm level At the firm level, energy efficiency offers untapped opportunities to reduce costs in both light and heavy industries In a competitive environment, firms are seeking to reduce costs, support sustainable growth and meet dynamic market demands. Energy is an important component of production costs in many industrial sectors, although its share varies by industry. These differences are influenced by the type and complexity of production. Heavy industries, such as steel, cement and chemicals, tend to be more energy intensive due to the large-scale processes and high thermal demands. Light industries, such as electronics…
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Flagship report
Apr 2026
Global Energy Review 2026 Coal
Global coal demand in 2025 grew moderately, remaining near 2024 levels Global coal demand in 2025 grew modestly above 2024 levels, rising by only 0.4%, an increase of around 30 million tonnes (or 0.7 EJ). This growth, which was in line with IEA estimates, was significantly below the 1.4% increase seen in 2024 and marked the end of the post-Covid rebound, with global coal demand growth slowing each year since 2021.Coal use in power generation diverged from recent trends in several regions around the world. In the United States, strong coal use in the power…
- Key findings
- Global trends
- Oil
- Natural gas
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+ 9 pages
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Fuel report
May 2025
Outlook for Biogas and Biomethane Key issues affecting biogas and biomethane projects
Development of feedstocks Differences in policy implementation and feedstock availability has resulted in feedstock mixes that vary widely by country and region: In Europe, biogas production was initially supported by feed-in tariffs and relied on energy crops as an important feedstock. Given the land use and biodiversity concerns associated with energy crops, this landscape has since changed, with several European countries implementing restrictions on their usage. The feedstock mix in Europe is now moving towards a mix of agricultural residues, animal manure, organic municipal solid waste and industrial waste. In China, household and farm biodigesters were central to biogas…
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Flagship report
Apr 2025
Energy and AI Energy supply for AI
Global electricity supply to meet data centre demand Global electricity generation to supply data centres is projected to grow from 460 TWh in 2024 to over 1 000 TWh in 2030 and 1 300 TWh in 2035 in the Base Case. Over the next five years, renewables meet nearly half of the additional demand, followed by natural gas and coal, with nuclear starting to play an increasingly important role towards the end of this decade and beyond.Coal, with a share of about 30%, is the largest source of electricity, though this varies significantly by region, with the highest contribution found in China. Renewables – primarily wind…
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Flagship report
Apr 2026
Global Energy Review 2026 Oil
Oil demand growth remained subdued in 2025 Oil demand increased in 2025 by 0.65 mb/d (million barrels per day) or 1.2 EJ, but this 0.7% rise marked a further slowdown from 2024’s already-muted 0.75 mb/d of growth. The increase in both years was in line with IEA projections. The 2025 increase fell well short of the 2010-19 average annual rise of 1.4 mb/d, offering further evidence of a structural deceleration in oil markets.This slowdown mainly reflected weaker growth in petrochemical feedstock use. Demand for naphtha, liquefied petroleum gas…
- Key findings
- Global trends
- Oil
- Natural gas
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+ 9 pages
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Technology report
Feb 2026
Clean Energy Technology Supply Chain Data Executive summary
Energy security in the Age of Electricity is inextricably linked to securing the supply chains for clean energy technologies and the equipment and materials used to manufacture them. As countries continue to pursue energy transitions and make investments in the deployment and manufacturing of these technologies – guided by industrial strategies – a detailed understanding of their supply chains has an essential role to play.The availability of good-quality, timely data is crucial to understanding clean energy technology supply chains and addressing vulnerabilities. Risks to supply chains can arise from interdependencies across technologies and between geographies, among other factors. Today, the…