Understanding Bioenergy: Types, Benefits, and Applications

Energy is fundamental to modern life, yet a large portion of the world still depends on fossil fuels that are finite, polluting, and concentrated in a handful of regions. Bioenergy – energy derived from organic, biological materials – offers a compelling alternative. It is one of the oldest energy sources humans have ever used, and today it is rapidly evolving into one of the most versatile tools in the global clean energy transition. According to IRENA, bioenergy accounts for roughly three-quarters of all renewable energy use worldwide, making it the single largest renewable energy source on the planet.

What is bioenergy? 🔗

Bioenergy is energy produced from biomass – living or recently dead organic matter, including plants, agricultural residues, animal waste, and organic portions of municipal solid waste. Unlike coal or oil, which release carbon locked away for millions of years, biomass absorbs carbon as it grows and releases it when used for energy, creating a carbon cycle that does not add new carbon to the atmosphere – provided it is managed sustainably.

Bioenergy use falls into two broad categories. Traditional bioenergy refers to burning wood, charcoal, animal dung, or crop residues for cooking and heating – practices that have existed for millennia and remain common across much of the developing world. Modern bioenergy refers to advanced technologies such as liquid biofuels, biogas from anaerobic digestion, wood pellet heating systems, and bio-refineries that convert biomass into electricity, heat, or fuel far more efficiently and cleanly than open-fire combustion.

The distinction between these two categories matters enormously. The IEA estimates that nearly 32% of all bioenergy used in 2023 came from traditional biomass burned over open fires – a practice linked to almost 3 million premature deaths from indoor air pollution that year alone. Transitioning from traditional to modern bioenergy is therefore not just an environmental goal; it is a public health imperative.

Types of bioenergy 🔗

Modern bioenergy is not a single technology – it is a family of distinct energy forms, each with different feedstocks, conversion processes, and end uses. The three main types are biopower, biogas, and biofuels.

Biopower 🔗

Biopower refers to electricity generated from biomass. Biopower generated 697 terawatt-hours (TWh) of electricity globally in 2023, accounting for 2.4% of the world’s electricity supply. It is produced by burning organic materials – wood chips, agricultural residues, sugarcane bagasse, or the organic fraction of municipal solid waste – to generate steam that drives turbines.

A particularly efficient application is combined heat and power (CHP), where a single facility captures both the electricity and the waste heat from combustion. CHP operations can utilize around 80% of the potential energy in biomass, piping heat to nearby buildings for heating or cooling. China led global biopower production in 2023 with 204 TWh, followed by Brazil and Japan. Denmark, Finland, and the United Kingdom generated more than 10% of their national electricity from bioenergy that year.

Biopower can also be paired with carbon capture and storage technology – a process known as BECCS (Bioenergy with Carbon Capture and Storage). Under certain conditions, BECCS can actually remove carbon dioxide from the atmosphere, making it a potentially critical tool for meeting net-zero climate targets.

Biogas 🔗

Biogas is a gaseous fuel – primarily methane – produced when organic material breaks down in the absence of oxygen through a process called anaerobic digestion. Feedstocks include animal manure, food waste, sewage sludge, and agricultural residues. Biogas is also called biomethane or renewable natural gas, and when properly treated, it can be used in exactly the same applications as fossil natural gas – heating homes, generating electricity, or fueling vehicles.

One of biogas’s key advantages is its compatibility with existing infrastructure. Biomethane can be injected directly into existing natural gas pipelines, meaning countries can decarbonize their gas supply without rebuilding entire energy networks. Biogas systems are also valuable at smaller scales – decentralized biogas digesters in rural India and sub-Saharan Africa have provided clean cooking fuel to communities that previously relied on open-fire wood burning. Sweden’s automaker Scania has even introduced biogas engines with improved fuel efficiency for heavy transport vehicles, illustrating how this technology is scaling into industrial applications.

Biofuels 🔗

Biofuels are liquid fuels produced from biomass, primarily for use in transportation. They are the most commercially widespread form of bioenergy today. Ethanol is made by fermenting carbohydrates from crops like corn, sugarcane, or sweet sorghum, while biodiesel is derived from plant oils such as soy, rapeseed, or palm oil. Both can be blended with conventional petroleum fuels and used in existing vehicle engines, making them a practical near-term option for reducing transport emissions.

Biofuels are categorized by generation. First-generation biofuels use food crops as feedstocks, which raises concerns about competition with food supply. Second-generation biofuels sidestep this by using non-food biomass – agricultural waste, wood chips, perennial grasses – as feedstock. Third-generation biofuels go further still, using algae and cyanobacteria, which can be grown on non-arable land without fresh water competition. Fourth-generation biofuels use genetically modified microorganisms to maximize energy yields, representing the cutting edge of the field. Brazil leads the world in biofuel production and is expanding rapidly under its Fuel of the Future law, which sets blending mandates for biomethane, ethanol, and biodiesel through 2030.

Bioenergy’s role in sustainability 🔗

Bioenergy’s significance in the global energy system goes well beyond simply producing power. It sits at the intersection of climate policy, energy security, agriculture, and economic development.

Reducing fossil fuel dependence and improving energy security 🔗

One of the most consistent arguments for bioenergy is that it reduces dependence on imported fossil fuels. Biofuels can be a low-cost alternative to expensive imported energy, creating additional revenues for governments and reducing vulnerability to oil price shocks. Countries like Indonesia, Brazil, and India have invested heavily in bioenergy partly for this reason – each has abundant biomass feedstocks and has pursued policies to shift both producers and consumers toward domestic biofuel use.

More than 80 countries currently have policies supporting liquid biofuels, and the Global Biofuel Alliance, formed at the 2023 G20 Summit, brings together 19 countries – including the United States, Brazil, India, and the UAE – to coordinate standards, advance technology, and accelerate global biofuel adoption.

Climate contribution and carbon neutrality 🔗

When biomass is grown sustainably, bioenergy operates within a closed carbon cycle. Plants absorb atmospheric CO₂ as they grow; that carbon is released when the biomass is burned for energy; and new plant growth re-absorbs it. This cycle does not add new carbon to the atmosphere the way burning fossil fuels does. Research published in 2025 in a peer-reviewed analysis of bioenergy and the UN SDGs identifies bioenergy as central to SDG 7 (affordable and clean energy) and SDG 13 (climate action), while also supporting goals around poverty reduction and economic growth.

That said, the climate benefit of bioenergy depends heavily on how the biomass is sourced. Unsustainable harvesting, land-use change, or long transportation distances can erode or eliminate the carbon advantage. This is why lifecycle assessments and robust sustainability criteria – such as those in the EU’s Renewable Energy Directive (RED III) – are increasingly standard requirements for bioenergy projects.

Applications and advantages of bioenergy 🔗

Bioenergy is one of the few renewable energy sources that can serve heating, electricity, and transportation – the three pillars of modern energy demand – using a single resource base.

Heating and electricity 🔗

Direct combustion is the most common method for converting biomass to useful energy. Wood pellets, chips, and agricultural residues are burned in boilers to heat homes, hospitals, schools, and industrial facilities. In countries like Finland and Sweden, district heating networks fed by biomass provide warmth to entire towns. In the electricity sector, biomass-fired power plants generate reliable, dispatchable power – meaning unlike wind or solar, they can generate on demand rather than depending on weather conditions. This “firm” renewable power is particularly valuable for stabilizing grids with high proportions of variable renewables.

Transportation 🔗

Biofuels currently provide the largest share of renewable energy in the transport sector. Ethanol blended into gasoline and biodiesel blended into diesel are already in widespread use across the Americas, Europe, and Asia. Beyond road transport, sustainable aviation fuel (SAF) – advanced biofuel designed for jet engines – is gaining serious traction. The EU’s RED III sets a 5.5% advanced fuel target for aviation by 2030, and the EU-funded FUEL-UP project is actively converting biogenic waste into advanced biofuels specifically for the aviation and marine sectors.

Economic benefits for rural and developing regions 🔗

Perhaps bioenergy’s most underappreciated advantage is its potential as a rural economic driver. Unlike solar or wind farms, which tend to concentrate jobs in manufacturing and installation in urban or industrial areas, bioenergy supply chains are inherently rural – feedstock growing, harvesting, processing, and distribution all generate local employment. The FAO identifies sustainable bioenergy as a contributor to improved farmer incomes, job creation, gender equality, and poverty eradication, particularly in the agricultural communities that supply feedstocks.

In remote areas where grid electricity is unavailable or prohibitively expensive to deliver, locally produced bioenergy provides a practical and affordable energy source. IEA Bioenergy notes that for developing economies, sustainable bioenergy directly addresses energy poverty, increases energy security, and supports energy access – goals that are especially pressing in sub-Saharan Africa, South and Southeast Asia, and Latin America, where biomass is already the primary energy source for hundreds of millions of people. Critically, transitioning those populations from inefficient open-fire combustion to modern bioenergy systems would simultaneously improve health outcomes, reduce deforestation pressure, and build local economic resilience.

The path forward for bioenergy is not without challenges – sustainable feedstock supply, competition with food production, land-use pressures, and the need for strong governance frameworks all require careful management. But the breadth of bioenergy’s applications, its compatibility with existing infrastructure, and its unique capacity to serve energy-poor rural populations make it an indispensable part of a sustainable energy future.

What do you think? As bioenergy scales up globally, how should countries balance the need for energy security with the risk of diverting agricultural land from food production? And given that bioenergy disproportionately benefits rural communities, do you think it receives enough attention in mainstream climate policy discussions?

References

1. https://www.irena.org/Energy-Transition/Technology/Bioenergy-and-biofuels
2. https://www.eesi.org/topics/bioenergy-biofuels-biomass/description
3. https://www.iea.org/energy-system/renewables/bioenergy
4. https://www.ren21.net/gsr-2024/modules/energy_supply/02_market_and_industry_trends/01_bioenergy/
5. https://en.wikipedia.org/wiki/Bioenergy
6. https://www.eia.gov/energyexplained/biomass/
7. https://www.sciencedirect.com/science/article/pii/S2589004225004183
8. https://www.frontiersin.org/journals/sustainable-energy-policy/articles/10.3389/fsuep.2024.1460370/full
9. https://pmc.ncbi.nlm.nih.gov/articles/PMC11994937/
10. https://www.fao.org/energy/areas-of-work/sustainable-bioenergy-from-agriculture/en
11. https://www.ieabioenergy.com/blog/publications/press-release-modern-bioenergy-provides-opportunities-for-developing-countries/