Scaling up biofuels, hydrogen and synthetic fuels is essential for meeting rising global energy needs while cutting greenhouse gas emissions.
Twenty-three nations — with Italy, Japan, India and Brazil at the forefront — have pledged to increase sustainable fuel production and use fourfold by 2035.
Achieving this objective will require interoperable standards, strong investment, coordinated cross-sector action and enabling policies to address cost, technology and feedstock constraints.
Liquid and gaseous fuels continue to anchor the global energy landscape, providing more than half of today’s energy supply. They power transportation systems, industrial operations and electricity generation — all pillars of economic activity. Yet clean fuels account for only about 2% of total fuel use.
Clean fuels generate significantly fewer pollutants than their conventional counterparts, reducing particulate matter, carbon monoxide and greenhouse gas emissions across their complete life cycle.
As global energy consumption rises — and electricity demand accelerates even more rapidly — a diverse, reliable portfolio of fuels will remain vital for meeting long-term energy needs and maintaining energy security.
Clean Fuels Are a Present-Day Imperative
Nearly all major energy outlooks project that fuel use will deliver 175–285 exajoules (EJ) of energy through 2050 — roughly five times today’s US energy consumption. Increasing clean fuel deployment from current levels is therefore indispensable for meeting global climate goals.
But the value proposition extends beyond emissions: clean fuels can spur new industries, strengthen job creation (with employment impacts 1.5–2 times higher than conventional fuels), reduce dependence on imported energy and stimulate innovation by tapping local resources.
The central question is no longer whether clean fuels matter — it is which pathways will scale, and how quickly and sustainably they can do so.
COP30 Momentum for Clean Fuels
The 2025 UN Climate Conference (COP30) in Brazil is generating new momentum and may become a major catalyst for expanding sustainable fuels.
The “Belém 4x” initiative — introduced by Italy, Japan, India and Brazil on 14 October in Brasilia and endorsed by 23 countries — establishes a shared commitment to quadruple the production and consumption of sustainable fuels by 2035. This includes biofuels, biogases, synthetic fuels and hydrogen.
Brazil’s decades-long experience with biofuels and biomass utilization positions it to play a central leadership role. By leveraging abundant biomass resources to advance transportation fuels, Brazil has demonstrated how emerging economies can deliver energy security, economic growth and climate progress simultaneously.
What Clean Fuels Encompass — and Why They Matter
Clean fuels represent a broad family of pathways, each defined by its feedstocks, technologies and maturity level:
- Biomass-to-X: Biofuels made from organic materials — crops, wastes, forestry residues — which today remain the most commercially established.
- Power-to-X: Synthetic fuels created from clean electricity, hydrogen and captured carbon or nitrogen.
- Fossil-to-X: Lower-carbon fossil fuel pathways achieved through carbon capture and storage, methane-leak mitigation or co-processing.
Molecular fuels remain indispensable for several sectors:
- Transport: Aviation, maritime shipping and heavy-duty road transport require dense, drop-in fuels and are among the fastest-growing energy users.
- Heavy industry: Sectors such as steel, cement and chemicals rely on molecular inputs for process heat and feedstocks, making clean fuels a key decarbonization tool.
- Energy systems: Fuels provide long-duration energy storage and global transportability, supporting flexible and resilient energy systems.
Clean fuels are already in use around the world. Ethanol, biodiesel, renewable diesel, biomethane and sustainable aviation fuel (SAF) are being produced at scale; refineries are incorporating bio-based processes; airlines are signing multi-year SAF agreements; and fleets are integrating renewable diesel into daily operations.
Challenges — and How to Overcome Them
A major barrier for many clean fuel types is their higher cost relative to fossil alternatives, which complicates investment and market uptake.
Addressing this challenge requires a coordinated mix of policy, standards and collaboration between governments and industry.
Policy and Standards
Today’s global policy landscape is inconsistent, with varying certification systems and incentive structures that create uncertainty for clean fuel producers and investors.
Brazil’s track record highlights effective approaches: ethanol, biodiesel, SAF and biomethane blending mandates; performance-based targets; fiscal incentives; and infrastructure investments — all contributing to a strong domestic market.
Similarly, the U.S. has successfully built, incentivized, and grown a strong domestic biodiesel, renewable diesel, SAF, and ethanol industry that utilizes a suite of renewable feedstocks like excess soybean oil, used cooking oil, and waste animal fats.
Market Readiness
Bridging the cost gap calls for mechanisms such as long-term offtake agreements, demand aggregation and shared risk models that link producers with end-users and accelerate commercial scale-up.
Feedstock Availability
Growing competition for feedstocks raises concerns around availability and price stability. Expanding into new residues and sustainable biomass sources requires investment in collection systems and logistics while ensuring that biofuel growth does not contribute to deforestation or land-use change.
Technology Maturity
While first-generation biofuels are mature, advanced biofuels, e-fuels and hydrogen-based fuels remain in the early stages of commercialization. Scaling these technologies demands capital, collaboration and risk-sharing, supported by demonstration projects and partnerships across the value chain.
Financing Mechanisms
Clean fuel facilities require substantial upfront investment and long planning horizons, often in markets with uncertain policy environments. De-risking tools, concessional capital and blended finance will be essential for attracting private investment.
Based on an article shared by the World Economic Forum. Edited for clarity and purpose. Image credit: Pixabay – SatyaPrem