White/light green spots on leaves

This one is my buddys plant. He has whitish/ dark green spots on the bottom of his plant at the leaves. Sometimes the spots are shiny. Will this damage his plants and how could he get rid of this?
 

Attachments

  • IMG_20161104_114747_409.jpg
    IMG_20161104_114747_409.jpg
    1 MB · Views: 19
  • IMG_20161104_114759_450.jpg
    IMG_20161104_114759_450.jpg
    969.4 KB · Views: 16
Back
Top