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Sodium-ion battery momentum grows, but challenges remain
batteries commentary sodium batteries Recent technological advances and investment announcements suggest dynamics are shifting for sodium-ion batteries Sodium-ion batteries are emerging as a new player in battery markets, offering opportunities to diversify battery chemistries and supply chains at a time of rising global demand for electric vehicles and energy storage. Developed in laboratories since the early 1980s, sodium-ion batteries operate on the same fundamental principles as lithium‑ion batteries – which currently dominate the market – yet their path to commercialisation has been markedly slower.While lithium-ion batteries entered commercial use in the 1990s – with the first electric vehicles…
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Energy Efficiency 2025
Market Report Energy Efficiency 2025 is the IEA’s primary annual analysis on global energy efficiency developments, showing recent trends in energy intensity and demand, investment, employment and policy. The report provides sector-specific analysis on industry, buildings, appliances and transport and explores system-wide themes such as emissions reductions, energy security, affordability and competitiveness. This report is launched in parallel with an update to the IEA Energy Efficiency Progress Tracker, which can be accessed through the IEA website.
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Global Methane Tracker 2026 Regional insights
Central and South America The fossil fuel sector in Central and South America emitted just under 8 million tonnes (Mt) of methane in 2025, around half of which was from oil and gas facilities in Venezuela. Oil and gas facilities are the main sources of methane emissions in Venezuela, Argentina and Brazil, whereas in Colombia emissions are split roughly evenly between coal mining and oil and gas activities. In Venezuela, the upstream methane emissions intensity of oil and gas operations is nearly six times the global average, and flaring intensity is around 12 times higher. The intensities of operations in Argentina…
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Asbjørn Hegelund
Former Energy Analyst.
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Madagascar
Around a quarter of the population of Madagascar has access to electricity, and only 1.5% has access to clean cooking facilities. In 2019, Madagascar’s energy mix was dominated by biofuels and wastes (85%), with oil products (11%), coal and hydro accounting for the rest of the total energy supply. In 2020, less than 5% of the population had access to clean cooking and 27% had access to electricity. The Government of Madagascar has set a target of reaching 70% electricity access rate by 2030.
- Overview
- Energy mix
- Emissions
- Electricity
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+ 5 pages
![Madagascar Flag]()
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Stepping Up the Value Chain in Africa
Minerals, materials and manufacturing This report explores key opportunities for African countries to step up the value chain in the growing global market for energy technologies, identifying opportunities beyond a role centred around extraction and mining to one more focused on mineral beneficiation, material production and technology manufacturing. These opportunities would enable Africa to retain a greater share of the economic value generated across energy technology supply chains, and would simultaneously contribute to global efforts to enhance supply chain diversification and resilience.The economic benefits of the new energy economy are currently distributed very unevenly. Emerging markets and developing economies…
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The Implications of Oil and Gas Field Decline Rates
Much attention today focuses on uncertainties affecting the future evolution of oil and natural gas demand, with less consideration given to how the supply picture could develop. However, understanding decline rates – the annual rate at which production declines from existing oil and gas fields – is crucial for assessing the outlook for oil and gas supply and, by extension, for market balances.The International Energy Agency (IEA) has long examined this issue, and a detailed understanding of decline rates is at the heart of IEA modelling and analysis, underpinning the insights provided by the scenarios in the World Energy Outlook.This new…
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Health
Multiple benefits of Energy Efficiency 2025 Energy efficiency provides multiple benefits. This page explores health. Why is energy efficiency important for health? Energy efficiency can improve health by creating healthy indoor and outdoor living environments with comfortable temperatures and humidity levels, and improved air quality. Key facts Energy efficiency measures have been linked to improved health, such as fewer respiratory illnesses.Targeted energy efficiency programmes can reduce doctor and hospital visits and save health costs. In New Zealand, a retrofit programme led to a 43% reduction in hospital admissions for respiratory conditions, while a similar programme in Ireland reduced the…
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World Energy Outlook 2025 Net Zero Emissions by 2050
Acting now to limit overshoot The Paris Agreement set the global goal of limiting warming to well below 2 °C and pursuing efforts to limit it to 1.5 °C. The IEA Net Zero Emissions by 2050 Scenario (NZE Scenario) translates the 1.5 °C goal into a global pathway for the energy sector. The updated NZE Scenario presented here takes account of the most recent data and trends. Each country will tailor its own path to net zero emissions. The updated NZE Scenario is based on four central pillars that are widely applicable: clean energy electrification, energy efficiency, low-emissions fuels and methane abatement. The…
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State of Energy Policy 2026 Climate pledges
The new round of NDCs does not imply stronger annual emissions reductions than the previous 2030 NDCs The past year marked a key milestone in the Paris Agreement’s ratcheting mechanism, under which countries update their climate pledges every five years. As of 27 March 2026, more than 130 countries had submitted new NDCs out of the 194 parties to the Paris Agreement that had previously submitted NDCs under the UNFCCC framework, with the vast majority setting new targets for 2035. In total, these submissions cover close to 75% of today’s energy-related greenhouse gas emissions.Some regions have not…
