// Resources
Further reading
The sources behind the claims on this site, organised by topic. Every figure and regulatory reference on this site is traceable to a primary or otherwise authoritative source listed below.
// Regulation and policy
- Regulation (EU) 2023/2405, ReFuelEU Aviation (2023), SAF mandate schedule, synthetic-fuel sub-mandate, and shortfall penalties (Article 12).
- Directive (EU) 2023/2413, RED III (2023), 70% lifecycle reduction threshold for renewable fuels of non-biological origin (RFNBO).
- Delegated Regulation (EU) 2023/1184 (2023), RFNBO production criteria, including the renewable-grid exemption (Article 4(1)).
- Delegated Regulation (EU) 2023/1185 (2023), RFNBO lifecycle greenhouse-gas methodology.
- Directive 2003/87/EC, EU Emissions Trading System, as amended (2003), ETS framework, including the SAF price-differential support mechanism (Article 3c(6)).
- EEA Joint Committee Decision 334/2023, EFTA (2023), incorporation of the ETS Directive (incl. Article 3c(6) SAF support, 100% Iceland tier) into the EEA Agreement.
- Lög nr. 106/2025 (Alþingi), amendment to the national emissions trading framework; the Article 3c(6) SAF support mechanism is not yet implemented in Icelandic law.
- EFTA Surveillance Authority, College Decision No 02626COL (11 February 2026), first EFTA-pillar SAF allowance allocation (1,970 allowances to Norwegian operators for 2024; Iceland claimed none).
- European Commission, SAF allowance allocation (September 2025), first EU-pillar allocation, about 1.3 million allowances (roughly EUR 100 million) to 53 operators.
- CINEA (European Commission), E-fuel Pilot Project factsheet, Innovation Fund ref. 101132987, EUR 40 million Innovation Fund grant to Nordic Electrofuel, Herøya, Norway.
- ICAO CORSIA, Carbon Offsetting and Reduction Scheme for International Aviation, default fossil comparator (89 gCO₂e/MJ) and eligible-fuels framework.
// Aviation emissions and SAF
- IEA, Aviation sector overview, global aviation CO₂ share, energy-density limits, and the role of SAF.
- Lee et al., The contribution of global aviation to anthropogenic climate forcing, Atmospheric Environment Vol. 244 (2021), non-CO₂ warming effects of aviation.
- ICAO, SAF portal, global SAF policy framework and decarbonisation potential.
- EASA, Sustainable Aviation Fuels, EU regulatory direction and SAF tracking.
- SASHA Coalition and Cerulogy, Fuelling nature (2024), biofuels for aviation and shipping put biodiversity at serious risk; e-fuels are the only solution compatible with both climate and biodiversity targets. Full report PDF.
- Greenpeace, Unhooking Europe from Oil (2022), identifies e-fuels from renewable electricity as the only acceptable alternative fuels for aviation and shipping.
- IATA, Jet Fuel Price Monitor, primary jet-fuel price data.
- ICCT, Life-cycle GHG emissions by SAF pathway (2025), lifecycle emissions compared across SAF pathways.
- ICCT, Why and how to bring down the cost of SAF (2025), SAF cost drivers and reduction levers.
- EASA, 2024 aviation fuels reference prices for ReFuelEU Aviation, Article 13 reference prices used for penalty calculations.
// Iceland energy and grid
- Orkustofnun, National Energy Authority of Iceland, Iceland grid composition and carbon intensity (approximately 70% hydro, 30% geothermal).
- Umhverfisstofnun, Environment Agency of Iceland, national emissions data, including ISAL aluminium-smelter emissions.
- Landsnet, Iceland national grid and connection.
- Hagstofa Íslands, external trade by HS chapter (UTA03801), fuel import origin, Strait of Hormuz transit share, NATO share.
- World Bank, Fuel imports as percentage of merchandise imports, Iceland, fuel-import dependency indicator.
- Carbon Recycling International, first commercial CO₂-to-methanol plant, operating in Iceland since 2012.
- Kadeco, Green Industrial Park and K64 masterplan, the project site at the former Keflavík base area.
- Carbfix, How it works and Matter et al., Science (2016), CO₂ mineralisation in basalt.
- Isavia, Keflavík Airport, transatlantic hub.
- Government of Iceland, Energy and EEA, Iceland renewable share, grid composition (about 73% hydro, 27% geothermal).
- Denholm et al., NREL/TP-6A2-45834 (2009) and Landsvirkjun, Fljótsdalur Power Station, wind-farm land use; Hálslón reservoir.
- Rio Tinto, ISAL, Iceland’s first aluminium smelter (Straumsvík, 1969).
- Icelandair Group MoU (2023) and Annual Report 2023; Cirium On-Time Performance Review 2023; Luxaviation MoU (2025) and 2024 Sustainability Report, offtaker commitments and quotes.
- CNBC, Jet fuel prices climb as Middle East conflict threatens summer flights (6 May 2026) and Euronews, the jet fuel crisis (17 April 2026), 2026 Strait of Hormuz jet-fuel price spike.
- IATA, Jet Fuel Price Monitor, weekly jet-fuel price index.
- Umhverfis- og orkustofnun, Almennar forsendur orkuspár 2025–2050 (Orkuspá, February 2026), national aviation fuel demand forecast (grunnspá: 420 kt by 2030).
- UOS-2025-4 (Umhverfis- og orkustofnun), Iceland aviation fuel sales 2024 (323,424 t; about 1,026 L/capita).
- Hagstofa Íslands, imports by HS code and country of origin, table UTA06201, jet fuel origin shares (Gulf/Hormuz over 60%, NATO about a quarter).
// Technology and standards
- ASTM D7566-24a, Standard specification for aviation turbine fuel containing synthesized hydrocarbons, synthetic jet-fuel specification.
- IEA, Global Hydrogen Review 2024, electrolyser capacity, efficiency, and deployment trends.
- Fraunhofer ISE, SAFari project, aireg webinar (2024), methanol-to-jet process detail, TRL assessments, co-products, and SAF yield.
- Topsoe, MTJet process, commercial methanol-to-jet technology description.
- Elwalily et al., Sustainable aviation fuel production via the methanol pathway: a technical review, RSC Sustainable Energy and Fuels (2025), peer-reviewed review of the methanol-to-jet pathway.
- CAAFI, ASTM D02.0J AC724 Task Force, methanol-to-jet ASTM qualification progress.
- ISCC, sustainability certification, EU and CORSIA certification frameworks (ISCC EU, ISCC CORSIA).
- Climeworks, direct air capture pilot and demonstration plants (Mammoth).
- Topsoe, MTJet process; Elwalily et al., RSC Sustainable Energy and Fuels (2025); CAAFI, Fuel Qualifications, methanol-to-jet process and ASTM qualification.
- Carbon Recycling International, George Olah plant; HIF Global, Haru Oni; INERATEC, ERA ONE, commercial e-methanol and FT-SPK demonstration plants.
- ASTM D1655, Aviation Turbine Fuels and UK Defence Standard 91-091, conventional Jet A-1 specification (AFQRJOS Joint Checklist); there is no EN aviation-fuel specification.
- Airbus, ZEROe; GreenAir News, ZEROe delay (2025); CompositesWorld, ZEROe timeline to 2040s (2025); Destination 2050, 2nd edition (February 2025), hydrogen-aircraft timeline and 2050 contribution.
- SASHA Coalition / Cerulogy, Fuelling nature (2024); RSPB, UK Bioenergy; Greenpeace, Unhooking Europe from Oil (2022), biofuel land-use and biodiversity.
- AACE International, Recommended Practice 17R-97, cost-estimate classification (Class V to Class I). dena country-risk matrix (Iceland lowest category).
// Market and demand
- Transport and Environment, e-kerosene reports (2024 to 2026), European e-fuel pipeline data, penalty exposure, electricity demand, and policy analysis.
- SASHA Coalition, Book-and-claim to de-risk European e-SAF production (2025), targeted support to de-risk e-SAF investment within the EEA. PDF.
- IEA, The Role of E-fuels in Decarbonising Transport (2023), e-fuel demand and cost outlook.
- IEA, Direct Air Capture, DAC cost projections.
- McKinsey, Global Energy Perspective 2024/2025, energy-transition demand scenarios.
- IRENA, International Renewable Energy Agency, renewable-electricity growth and the role of e-fuels.
- ENTSO-E, Market Design and Regulatory Framework for Viable and Flexible Hydrogen Production, Executive Summary (2025), electricity as 60 to 77% of hydrogen production cost; RFNBO temporal matching tightening from 2030.
- Infinium, Announces Construction of Large-Scale eFuels Production Facility in Texas (19 May 2025), Project Roadrunner FID, 23 kt/yr.
- Brookfield to invest up to $1.1 billion in Infinium (10 September 2024), over $200M to Roadrunner, up to $850M conditional tail.
- Gasworld, Twelve secures $645M funding (September 2024), Twelve capital raise led by TPG Rise Climate.
- Taxpayers for Common Sense, Hydrogen Secured Last-Minute Win in Budget Bill (July 2025) and Norton Rose Fulbright, Effects of the One Big Beautiful Bill on Projects (July 2025), US 45V hydrogen PTC construction-start window shortened to end-2027.
- SAS, Aviation Insights No. 6: The Need for e-SAF in Scandinavia (April 2026), Nordic e-SAF demand and supply-security framing.
- New Security Beat (Stimson Center), Is China’s Sustainable Aviation Fuel Ready to Take Off? (2026); Blackridge Research, SPIC $5.85bn green hydrogen fuel investment (2024); OilPrice.com, China’s coal-to-liquids expansion (2026), China SAF and CtL.
- European Commission, Press release IP/26/629 (22 April 2026), AccelerateEU; Jørgensen statement.
- Nature Communications, Solar-driven direct air capture to produce sustainable aviation fuel (2026); IEA, Direct Air Capture; Climeworks, DAC costs.
- IEA, Breakthrough Agenda Report 2025, Power chapter; IEA, The Role of E-fuels in Decarbonising Transport (2023); McKinsey, Global Energy Perspective, renewable-cost and e-fuel demand outlooks.
- IATA, SAF Production Growth Rate is Slowing Down (December 2025), Europe’s 2030 SAF requirement (4 Mt per year) against current global production (about 2.4 Mt per year). Cited by the eSAF Market stat bar (1).
- Decarbonfuse, eSAF Takes Flight: Power-to-Liquid Tech Sparks 48% Growth, projected 48% annual eSAF growth through 2031 (industry estimate, InsightAce Analytic). Cited by the eSAF Market stat bar (2).
- GreenAir News, EU states to mobilise EUR 500M support for early-mover eSAF and European Commission, eSAF Early Movers Coalition announcement (4 December 2025), EUR 500 million mobilised by 8 member states (Austria, Finland, France, Germany, Luxembourg, Netherlands, Portugal, Spain) for the first eSAF auction in 2026. Cited by the eSAF Market stat bar (3).
- Transport and Environment, EU agrees to world’s largest green fuels mandate for aviation, Europe’s 2050 SAF requirement (43 Mt per year), up from about 2 Mt today. Cited by the eSAF Market stat bar (4).
- ICCT, Current and future cost of e-kerosene in the United States and Europe (2022), e-kerosene production-cost projections.
- Seymour et al., Future costs of power-to-liquid sustainable aviation fuels produced from hybrid solar PV-wind plants in Europe, RSC Sustainable Energy and Fuels (2024), peer-reviewed PtL SAF cost projections.
- IRENA, Green Hydrogen Cost Reduction (2020), electrolyser scale-up and cost-reduction outlook.
- IRENA, Renewable Power Generation Costs in 2023 (2024), renewable electricity cost data.
- IRENA, Reaching Zero with Renewables: Biojet Fuels (2021), biojet and synthetic-fuel scaling outlook.