Gaia warns the planeteers of unsafe nuclear practices that threaten the Earth and what a world polluted with nuclear radiation would look like. Gi and Linka discuss the harmful properties of nuclear radiation on human bodies.
The Planeteers go to a laboratory and spot animals being exposed to radiation. Dr. Rottenberry thinks he is helping the animals to be better adapted to life without the protection of the ozone layer. Linka suggests that humans should replace the things we do that cause ozone depletion, but Dr. Rottenberry says that would require the cooperation of nations all over the world.
Per Thomas Edison's suggestion, The Secret Labbers visit Frederick Soddy to better understand radioactive decay.
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