Complex sentence: There, Nada and Frank are given updated contact lenses to replace their glasses and discover from the bearded man's transmission that the aliens are using Earth as their third world, depleting its resources before moving onto other planets and causing global warming.
Split into simpler sentences: There, Nada and Frank are given updated contact lenses to replace their glasses and learn from the bearded man's transmission. The aliens are using Earth as their third world, depleting its resources before moving onto other planets and causing global warming.