When a tree burns or decomposes, it releases the same amount of CO₂ into the environment as it had assimilated during its lifespan. GUTEX boards are manufactured from untreated wood chips and shavings and therefore do not increase the level of CO₂ gas in the atmosphere when they decompose or burn. The biologically safe nature of the products underscores their recylability. GUTEX wood fibre insulation boards’ existence and nature are completely within ecological cycles or more specifically biochemical cycles.