Why is the manufacture of wind turbine blades a self-sustaining and certified process, which at no time contributes to deforesting forests? ? Spanish factories have sustainable and certified processes, and at no time do they contribute to deforesting forests in balsa wood exporting countries. ? Spanish factories work with companies that have sustainability certifications for their plantations, as well as quality, and traceability of the balsa wood exploitation cycle (FSC Forest Certification). ? The use of PET plastic as a substitute for balsa wood has been progressively being adopted in recent years in the manufacture of blades. ? The blades of older wind turbine models contain 1 to 3% balsa wood in their manufacture.