Godzilla vs. Hedorah

The microscopic alien lifeform Hedorah feeds on Earth's pollution and grows into a poisonous, acid-secreting sea monster. After it sinks an oil tanker and attacks Dr. Toru Yano and his young son Ken Yano, scarring them both, Hedorah's toxic existence is revealed to the public. Ken Yano has visions of Godzilla fighting the world's pollution, Dr. Toru Yano and his wife Toshie Yano has determined to destroy the unkillable monster and insists Godzilla will come to humankind's aid against Hedorah.