By Abbas Nazil
New research from the University of East London (UEL) shows that agricultural waste, usually burned or left to decay, could significantly help combat climate change if repurposed into long-lasting building materials.
Fibrous residues from crops such as wheat, rice, and maize, produced in billions of tonnes globally each year, can act as a carbon sink when incorporated into construction products like insulation, panels, and boards.
Unlike traditional disposal methods, which release carbon back into the atmosphere within months, using these residues in durable materials can store carbon for decades, providing a measurable cooling effect over time.
The study, led by Dr. Bamdad Ayati from UEL’s Sustainability Research Institute, is among the first to assess this potential on a global scale using a “dynamic” life-cycle approach.
This method tracks the timing of carbon release and storage, revealing how conventional carbon accounting underestimates the climate benefits of long-lived bio-based materials.
The research suggests that halting the open burning of agricultural residues and redirecting them into building products could produce sustained climate benefits throughout the next century.
When combined with renewable energy to replace biomass energy, the climate mitigation effect is further enhanced.
The study also highlights a major imbalance: although about 4.4 billion tonnes of agricultural residues are generated annually, only a small fraction is used in durable applications, while most are burned, left to decay, or used as animal feed.
Even with ambitious growth in bio-based insulation, only a small share of this material is absorbed, indicating the need for wider adoption of bio-based construction products beyond niche markets.
Dr. Ayati emphasized that agricultural residues are an overlooked climate resource that could transform the construction sector while significantly reducing atmospheric carbon.
The research calls for a strategic shift in how crop residues are perceived, moving from waste management challenges to climate mitigation opportunities.
Expanding the use of these residues in long-lived construction products could offer a scalable and cost-effective solution to reduce global carbon emissions while simultaneously supporting sustainable building practices.
This approach positions agricultural residues as a hidden, high-potential resource to fight climate change and contribute to long-term environmental sustainability.
