I really guess it would depend on the perspective of the alien. Obviously its society has advanced technology or it wouldn't be able to get here. Therefore, I imagine it would consider us a less advanced species technologically speaking. Beyond that there is no frame of reference by which one could guess how they would describe us.
If they came here because they destroyed their own world they might consider us a very green and environmental society for the way we have "protected our planet", even though most "earthlings" think we have abused our home. It all depends on perspective.