For generations, burning was the fast answer to a slow problem. A field full of stubble, cleared in an afternoon with a match — cheap, simple, and effective against certain pests and diseases. It’s easy to see why the practice stuck around for so long.

It’s also, across most of the EU today, against the law. European air quality guidance is direct about it: field burning of agricultural residues has been largely outlawed across the bloc. The reason isn’t bureaucratic tidiness — it’s the smoke itself. Burning crop residue releases ammonia, nitrogen oxides, particulate matter, and — when residue is compacted before burning — dioxin emissions that can spike sharply higher than from a loose, well-aerated burn. None of that stays neatly on one farm; it moves with the wind.

So the practice has, in most places, quietly disappeared. What replaced it is less a solution than a workaround: residue gets ploughed back into the soil, or removed and stored, or occasionally burned for heat and power under controlled conditions. All of that solves the legal problem. None of it solves the economic one — a farmer still has a field full of material that has to be dealt with, and in most cases still returns little or nothing in exchange.

Bio-LUSH is built to give that residue a third option, one that isn’t burning and isn’t just quiet disposal. The same material that current practice mostly tries to get rid of — banned to burn, costly to remove, worth little to sell — is exactly what the project is refining into nanocellulose: a mild alkaline process pulls out high-quality cellulose fibres while keeping the process chemicals recoverable, so the residue leaves the field as an input for something new instead of a problem to be managed.

Sources

European Environment Agency, EMEP/EEA Air Pollutant Emission Inventory Guidebook 2023 — 3.F Field Burning of Agricultural Residues: https://www.eea.europa.eu/en/analysis/publications/emep-eea-guidebook-2023/part-b-sectoral-guidance-chapters/3-agriculture/3-f-field-burning-of/@@download/file
Bio-LUSH project record, CORDIS (European Commission): https://cordis.europa.eu/project/id/101112476