My friend told me that if we don't protect the earth, there's gonna be a whole in the ozone layer which will cause aliens to come on our planet.  So I told him that's nice. We could learn from aliens. Let them teach us stuff and grow more advanced as humans.  This could totally be a good and productive thing for us.  What do you think Bill?
that's nice but if you don't close the ozone after the aliens get here then they're just going to leave