Here is a lovely pro-nuclear comic book from 1972. Though it predates The Watchmen by more than a decade, check out the Doctor Manhattan-ish figure on the cover.

Description from the source:

Produced by The Canadian Nuclear Association and given away by the local Hydro-Electric company. Discusses what nuclear radiation is and how it affects humans, plants and animals. Radiation poisoning and alternatively it’s uses in medicine are shown, the anatomy of an atom, Albert Einstein, fission, the nuclear industry and why it is safe, the positive effects of radiation on the growing of vegetables etc., etc. A two-page centerfold discusses how the nuclear industry is helping to protect Canadians.

I admit I went through every page of this retro-licious science gem.

Love the maple leaf nucleus!

You can see all the pages here.