Yeah, it was Moore who introduced the idea of many of the Rannians being sterile, and also how much of their ecology was still suffering the effects of the nuclear war a thousand years before (mentioned in the first Gardner Fox Adam Strange story)...and Swamp Thing worked to restore the ecology of Rann.
To this day, when someone asks me how far it is from Earth to the nearest star in MILES, not in light years, I can answer "25 trillion miles" thanks to the Adam Strange stories.