The movie was adapted by Paul Osborn[?] from two novels -- Borden Deal[?]'s Dunbar's Cove and William Bradford Huie[?]'s Mud on the Stars. It was directed by Elia Kazan.
... use hydrogen sulfide instead of water in their photosynthetic pathway: CO2 + 2 H2S → CH2O + H2O + 2S Some of these produce globules of sulfur as a waste ...