The font is very small ;)
LCA is a relative method, everything depends in a linear manner on the quantitative reference of your product system. You can make an LCA of 1e-6 wind turbines and you will get small values. You can make an LCA study of 1 million wind turbines and you will get large values.
Another possibility is that your model is somehow not capturing the impacts, due to a mismodelled life cycle or because you are using an imapct assessment method that is not really supported by your database. You probably do not want to "write an impact assessment" but make an LCA study / model?
