Biomass matters because it converts organic material that already exists, such as wood, crop residues, and organic waste, into energy, fuels, and materials that can replace fossil-fuel-based products. It plays a role in the carbon cycle, supports rural economies, strengthens energy security in remote areas, and serves as a feedstock for biodegradable plastics and chemicals. Its importance is large enough that the International Energy Agency projects global bioenergy demand reaching around 100 exajoules by 2050 in a net-zero scenario.
How Biomass Fits Into the Carbon Cycle
Plants absorb carbon dioxide as they grow, locking carbon into their leaves, stems, and roots. When that plant material is burned or decomposed for energy, the carbon returns to the atmosphere. This is fundamentally different from burning coal or oil, which releases carbon that has been stored underground for millions of years and adds a net increase of greenhouse gases to the atmosphere.
The carbon-neutral label comes with caveats, though. Some of the carbon in plant material enters the soil during decomposition rather than escaping as CO₂, effectively sequestering it. But if forests are cleared faster than they regrow, or if fossil fuels are used to harvest and transport biomass, the net emissions picture gets worse. The climate benefit depends entirely on how biomass is sourced and managed. Waste streams like crop residues and sawmill byproducts carry a much lighter carbon footprint than dedicating new land to energy crops.
A Locally Available Energy Source
One of the most practical reasons biomass matters is that it can be produced almost anywhere plants grow. Rural and isolated communities that lack reliable grid electricity or affordable fuel deliveries can generate heat and power from agricultural waste they already have on hand. In the highlands of Colombia, for example, communities above 3,000 meters have limited electrical grid coverage and depend on firewood and diesel. Researchers have found that residues from potato and scallion farming in those regions hold substantial energy potential, enough to design decentralized pilot projects that reduce dependence on firewood and fossil fuels while easing pressure on fragile mountain ecosystems.
This pattern repeats across the developing world. The IEA’s net-zero scenario envisions bioenergy demand in the buildings sector reaching nearly 10 exajoules by 2030, mostly in emerging economies replacing traditional open-fire cooking with improved cookstoves. That shift addresses both energy access and indoor air pollution, which kills millions of people annually.
How Biomass Becomes Usable Energy
Biomass doesn’t just get thrown into a fire. There are several established conversion pathways, each producing different end products. Direct combustion is the simplest: burn the material to produce heat or steam that drives a turbine. Gasification heats biomass in a low-oxygen environment to produce a combustible gas mixture. Pyrolysis uses heat without oxygen to break biomass down into liquid bio-oil, solid biochar, and gases. Torrefaction is a milder heat treatment that produces a dense, stable solid suitable for co-firing in power plants or stabilizing electricity grids.
The energy packed into biomass is surprisingly consistent across plant species. On a dry, ash-free basis, nearly all plant material falls in the range of 17 to 21 megajoules per kilogram. Fir wood sits around 21 MJ/kg, willow around 18.7, switchgrass at 17.4, and cereal straw at 17.3. For comparison, coal ranges from about 24 to 35 MJ/kg, so biomass carries less energy per kilogram but is renewable and widely available. The relatively narrow energy range across feedstocks means a biomass power plant can often switch between locally available materials without major redesigns.
Jobs and Rural Economies
Biomass energy is labor-intensive compared to fossil fuels, and that turns out to be an economic advantage for the communities where plants are built. According to the National Renewable Energy Laboratory, biomass power generates about 4.9 full-time jobs for every megawatt of installed capacity, with support jobs (harvesting, transporting, and processing feedstock) outnumbering plant jobs by nearly two to one. Losing the biomass energy industry would eliminate close to 12,000 rural positions in the United States alone, with serious regional consequences in areas that have few other employment options.
These jobs tend to be local by nature. Unlike a natural gas pipeline or an oil tanker, biomass feedstock is bulky and expensive to ship long distances. That keeps the economic activity close to where the fuel is grown or collected.
Beyond Energy: Bioplastics and Biochemicals
Biomass isn’t only about generating electricity or heat. It’s increasingly a raw material for products that currently depend on petroleum. Biorefineries convert plant matter into biodegradable plastics, base chemicals, and packaging materials. Cellulose, the main structural component of plants, is especially attractive because it’s abundant, biodegradable, and can be chemically modified into films for food packaging. Starch and lignin serve similar roles.
The most commercially developed bioplastics include polylactic acid (PLA), commonly used in compostable cups and containers, and starch-based plastics used in bags and cutlery. Researchers are also engineering microorganisms to convert CO₂ directly into bioplastic precursors, with lab yields already reaching 1.6 grams per liter under light-driven conditions. These processes fit into a circular bioeconomy model: waste biomass goes in, and useful materials come out, reducing both landfill volume and demand for fossil-derived plastics.
The Environmental Trade-offs
Biomass is not without downsides, and air quality is the most significant one. Burning wood and crop residues releases fine particulate matter (PM2.5), the single greatest environmental risk factor for human health worldwide. In European cities, residential biomass burning is almost entirely responsible for the fine particulate emissions from the residential sector. Biomass combustion also releases nitrogen oxides, polycyclic aromatic hydrocarbons, volatile organic compounds, and dioxins, all of which carry well-documented health risks. Nitrogen oxides alone account for about 17% of the residential sector’s contribution to air pollution in studied areas.
Modern industrial biomass plants use filtration and scrubbing systems that dramatically reduce these emissions compared to an open fireplace or backyard burn pile. The pollution problem is most acute in household-scale burning, particularly older stoves and open fires. This is one reason the IEA’s net-zero pathway calls for traditional biomass use (open cooking fires, crude stoves) to drop to zero by 2030, replaced by cleaner modern alternatives.
What the Future Looks Like
The IEA’s net-zero pathway sets global bioenergy supply at roughly 100 exajoules by 2050, deliberately kept at the low end of estimated sustainable potential to avoid overexploiting land. Of that total, about 60% would be solid bioenergy, nearly 30% liquid biofuels, and over 10% biogases. Liquid biofuel consumption alone is projected to rise from 1.6 million barrels of oil equivalent per day in 2020 to 6 million by 2030, driven largely by heavy-duty trucking that’s difficult to electrify.
The sourcing strategy matters as much as the volume. Today, only about 20% of global bioenergy comes from waste streams that don’t require dedicated land. By 2050, the net-zero scenario pushes that figure above 60%, meaning the majority of biomass energy would come from agricultural residues, forestry byproducts, and municipal organic waste rather than crops grown specifically for fuel. That shift is critical for avoiding competition with food production and limiting deforestation, the two biggest sustainability risks biomass faces as it scales up.