I'm With Dr. Gori Socks

Banished from the peaceful and highly advanced simian Planet E in the Geisty Solar System, the mutant mad scientist Dr. Gori and his brutish gorilla-like assistant Karras (Ra in the Japanese version) search for a new world to rule after Gori's plot to conquer Planet E had been foiled by its government. Traveling to Earth in their flying saucer, the blond alien apeman is captivated by its beauty but appalled by its inhabitants' misuse of its environment, leading to severe pollution (a huge topic back when this series was made, since Tokyo in Japan was the most polluted city in the world at the time), so humankind must be quickly conquered if this planet is to remain habitable.