Thundarr the Barbarian (1980)

In the year 1994, a comet hurtles between Earth and the moon. The moon is destroyed, and the Earth loses its ozone layer--causing the entire planet to be laid waste. Centuries later, Earth has become "a world of savagery, super-science, and sorcery," inhabited by various evildoers, scavengers, and magicians. Thundarr, a warrior who wields a powerful sword, is joined by his friends Ookla the Mok and Princess Ariel as they make their way through this strange world.