A novel approach to carbon sequestration is being explored by a US start-up, proposing that burying wildfire-damaged trees could lock up their stored carbon for centuries. Traditionally, trees left standing but partially burnt after wildfires are felled and then burned, a process that releases the carbon they have accumulated back into the atmosphere, contributing to greenhouse gas emissions.
The start-up argues that by burying these trees, the carbon they contain would be trapped underground, preventing its release and potentially offering a long-term solution for carbon sequestration. This method represents a departure from current post-wildfire land management practices, which often prioritise reducing fuel loads to prevent future fires and clearing land for regeneration.
The concept hinges on the principle that decomposition rates are significantly slower in anaerobic, underground environments compared to above-ground burning or natural decay. If successful, this could mean that the carbon remains sequestered for hundreds of years, making it a potentially valuable tool in the global effort to combat climate change.
While the immediate focus is on areas prone to wildfires, particularly in the US, the implications of such a method could be far-reaching. As climate change increases the frequency and intensity of wildfires globally, including in parts of Europe, finding effective ways to manage post-fire landscapes and mitigate carbon emissions becomes increasingly crucial.
The practicalities of implementing such a large-scale burial operation, including the logistics of felling, transporting, and burying vast quantities of trees, would need thorough evaluation. Furthermore, environmental assessments would be necessary to understand any potential impacts on soil composition, water systems, and local ecosystems. The viability and cost-effectiveness of this method compared to other carbon capture technologies or traditional forestry practices would also be key considerations.