I didn't know about balsa wood in Wind Turbines either until this thread - looked it up and found that it's being replaced with PET foam because of the problems

I didn't know about balsa wood in Wind Turbines either until this thread - looked it up and found that it's being replaced with PET foam because of the problems caused by deforestation (etc) https://www.usitc.gov/publications/332/executive_briefings/ebot_from_balsa_wood_to_polymer_foam_in_wind_turbine_blades.pdf https://www.usitc.gov/publications/332/executive_briefings/e...