Bioenergy is energy made from recently living material, such as wood, crop residues, manure, food waste or purpose-grown plants. That material, called biomass, can be burned for heat and electricity, broken down into biogas, or refined into liquid fuels like ethanol and renewable diesel. In Canada, bioenergy is already a quiet workhorse, especially in the forest industry, rural heating and transportation fuels. It's renewable in that plants regrow, but whether it's truly low-carbon depends on where the biomass comes from and how it's used.
Key takeaways
- Bioenergy comes in three main forms: solid biomass (wood, pellets), biogas and renewable natural gas, and liquid biofuels (ethanol, biodiesel, renewable diesel).
- Canada's large forest and farm sectors make bioenergy a significant renewable source, much of it used on-site by sawmills and pulp mills.
- Using wastes and residues generally offers the clearest climate benefits. Harvesting trees or crops just for fuel is more debated.
- Unlike solar and wind, bioenergy can be stored and dispatched on demand.
- Air quality, land use and sustainable sourcing are the main issues to weigh.
Where bioenergy comes from
Plants capture energy from sunlight through photosynthesis and store it as carbon-rich material. Bioenergy releases that stored energy. Common Canadian feedstocks include:
- Forest residues and mill waste: sawdust, bark, shavings, branches and tops left after harvest
- Agricultural residues: straw, corn stover, husks
- Energy crops: corn and wheat for ethanol, canola and soy for biodiesel
- Organic wastes: manure, food scraps, wastewater sludge, landfill gas
- Used oils and fats: cooking oil and animal fats, often turned into renewable diesel
The main types of bioenergy
| Type | How it's made | Main uses in Canada |
|---|---|---|
| Solid biomass | Burning wood, chips or pellets | Home heating, district heat, mill power and steam |
| Biogas | Bacteria break down wet waste without oxygen | On-farm power and heat, wastewater plants |
| Renewable natural gas (RNG) | Biogas cleaned up to pipeline quality | Injected into gas grids, vehicle fuel |
| Ethanol | Fermenting starch or sugar crops | Blended into gasoline |
| Biodiesel and renewable diesel | Processing vegetable oils and fats | Blended into diesel, used in trucks and equipment |
Solid biomass
The oldest form of bioenergy: a wood fire. Today it includes high-efficiency wood stoves, pellet stoves and boilers, and larger plants that burn mill residues to make steam and electricity. Our guide to wood pellet stoves and boilers covers the home-scale options.
Biogas and RNG
When organic matter breaks down without oxygen, in a sealed digester or a landfill, it produces a methane-rich gas. Captured biogas can run generators or boilers. Upgraded to nearly pure methane, it becomes renewable natural gas that can flow through existing gas pipes. See Renewable Natural Gas Explained for more.
Liquid biofuels
Ethanol and biodiesel have been blended into Canadian fuels for years, and renewable diesel, a chemically different "drop-in" fuel, is growing fast. Our biofuels explainer walks through the differences.
How bioenergy fits into Canada's energy mix
Bioenergy's biggest user in Canada is the forest products industry. Pulp and paper mills and sawmills burn their own bark, sawdust and black liquor (a pulping by-product) to produce heat and power, which cuts waste and fossil fuel use at the same time. Beyond that:
- Rural and northern homes heat with wood and pellets, especially where natural gas isn't available.
- Remote communities are adding biomass district heating to reduce diesel use. Biomass heating in northern communities is a growing story of its own.
- Transportation fuels carry a required share of renewable content under federal and provincial rules.
- Gas utilities in several provinces are adding RNG to their supply.
Our bioenergy hub gives a broader overview, and it explains how the mix differs across the country.
The benefits
- Dispatchable renewable energy. Biomass and biogas can be stored and used when needed, which complements variable wind and solar power.
- Turning waste into value. Using residues and organic waste avoids open burning, landfill methane and disposal costs.
- Local jobs and fuel security. Particularly in forestry, farming and remote regions.
- Uses existing infrastructure. RNG and drop-in biofuels work in today's pipelines, furnaces and engines.
The trade-offs and debates
Bioenergy isn't automatically green. The main questions are:
- Carbon accounting. Burning biomass releases CO₂ right away, and regrowth reabsorbs it over years to decades. The climate benefit depends on the feedstock and timeframe. We dig into this in Is Burning Wood Carbon Neutral?.
- Air quality. Older wood stoves and poorly run boilers emit fine particulate matter. Modern certified equipment is much cleaner.
- Land and food. Crop-based biofuels compete for farmland, and their net benefits vary.
- Sustainable sourcing. Forest biomass should come from residues or well-managed forests, not from clearing for fuel alone.
Our carbon page explains how emissions are measured across energy sources.
Frequently asked questions
Is bioenergy renewable?
Yes, in that plants and waste streams are replenished. Whether it's low-carbon is a separate question that depends on feedstock, harvesting practices and how efficiently the energy is used.
Is bioenergy the same as biomass?
Not quite. Biomass is the raw material: wood, crops, waste. Bioenergy is the heat, electricity or fuel made from it.
Can I use bioenergy at home?
Yes. Common options are certified wood or pellet stoves and boilers. In some regions, you may also be able to buy renewable natural gas through your gas utility.
The bottom line
Bioenergy is a flexible, storable renewable resource that Canada already uses widely, from pulp mills to pellet stoves to the fuel at the pump. Its value depends on smart sourcing: residues and wastes first, clean-burning equipment, and honest carbon accounting. Seen that way, it's a useful part of a balanced clean-energy mix alongside solar, wind, hydro and heat pumps.
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