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Rail
Country and regional highlights
Europe targets modernisation of the rail network and India rapid electrification, while China is expanding its network with a focus on high-speed rail
CO2 emissions
Rail is the least emissions-intensive mode of passenger transport – its expansion will help reduce overall emissions
Energy
Expansion of electric trains continues rapidly in the NZE Scenario, particularly to replace diesel-powered freight trains
Activity
Innovation
Policy
Acknowledgements
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Hydrogen
Low-emissions hydrogen projects are set to grow strongly despite wave of cancellations and persistent challenges
Worldwide hydrogen demand increased to almost 100 million tonnes in 2024, up 2% from 2023 and in line with overall energy demand growth. The vast majority of this was met by hydrogen produced from fossil fuels without measures in place to capture associated emissions. Sectors that have traditionally used hydrogen, such as oil refining and industry, remained the biggest consumers.
The uptake of low-emissions hydrogen is not yet meeting the expectations set by industry and governments in recent years, especially in light of…
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Electrolysers
Country and regional highlights
Progress is spread across different continents, from China, which leads on installed capacity, to the European Union, which have adopted important policies, and other regions like India and the Middle East moving forward with a small number of large-scale projects
Technology deployment
Global installed electrolyser capacity reached 1.4 GW at the end of 2023, almost double the one at the end of 2022
Technology manufacturing
Innovation
Policy
Investment
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Aluminium
Country and regional Highlights
Technological progress is being made in a range of countries, while the expected expansion of China’s emissions trading systems will be key to reducing direct emissions
CO2 emissions
Further action to reduce emissions intensity will be needed to get on track with the NZE Scenario
Energy
While the energy efficiency of aluminium production has improved, fuel switching needs to accelerate
Activity
Technology deployment
Innovation
Supporting infrastructure
Policy
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Grid-scale Storage
Country and regional highlights
Major markets target greater deployment of storage additions through new funding and strengthened recommendations
Technology deployment
Pumped-storage hydropower is still the most widely deployed storage technology, but grid-scale batteries are catching up
Innovation
While innovation on lithium-ion batteries continues, further cost reductions depend on critical mineral prices
Policy
Investment
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International Shipping
Country and regional highlights
Advances in emissions regulations and technologies to decarbonise shipping
CO2 emissions
CO2 emissions from international shipping continued to rebound in 2022 following a dip in 2020
Energy
Scaling up low-emission fuels is the key to decarbonising international shipping
Technology deployment
Methanol-fuelled fleet increasing in near-term
Innovation
Industry continues to develop zero-emission vessels
Supporting infrastructure
Policy
International collaboration
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Light Industry
Country and regional highlights
Important investment programmes are being deployed to push energy efficiency and decarbonisation in light industries
CO2 emissions
While light-industry emissions have declined since 2010, a more rapid decline is needed to get on track with the NZE Scenario
Energy
The share of fossil fuel use is declining, but progress needs to accelerate
Technology deployment
Firms should prioritise technologies for low-emission process heat and increased energy efficiency
Innovation
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Steel
Country and regional highlights
Near zero-emission projects advance fastest in Europe, with some progress for low-emissions facilities globally
CO2 emissions
The CO2 emission intensity of steel has been relatively stable in recent years, but needs to drop significantly to align with the NZE Scenario
Energy
A reduction in reliance on coal and an increase in electricity use are required to get on track with the NZE Scenario
Activity
Material efficiency strategies are required to balance demand growth
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Cars and Vans
More stringent and broader coverage of fuel efficiency standards for light-duty vehicles is needed
For cars and vans, increasing fuel efficiency standards is important as even in the Net Zero Emissions by 2050 Scenario, nearly 80% of cars and vans on the road in 2030 are still powered with internal combustion engines. Sales of heavier, less efficient SUVs reached around 46% of global sales in 2022, while electric vehicles were just 14% of sales. More and more countries are formulating vehicle efficiency standards and some are even putting in place zero-emission vehicle sales requirements. To be in line…
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Building Envelopes
Stronger efficiency is the first and best policy to bring down energy bills
Variations in energy efficiency exist both within and among countries. For example, in some European countries with similar climates it can take twice as much energy to heat the same floor area or within one country the energy consumed between the most efficient and least efficient homes for a given size can vary by a factor of up to three.