This is probably the best use of Christmas trees (though it’s up for debate whether it’s a good idea to cut down spruce trees to begin with).
Side note: it was hard to find this story on a website that’s not exclusive access or enshitified. Even the company who built the turbine (#Modvion) has a tor-hostile website themselves.
According to the BBC Newsroom they use glue instead of bolts to hold it together.
Almost all trees that are cut down for Christmas were farmed specifically for that purpose. People have a gut reaction when they hear about cutting down trees, but trees are a renewable resource especially conifers that tend to be fast growing.