Imho, they want to darken the skies, a la animatrix/billy gaytes globohomo climate change bullshit— they wouldn’t want radioactive lands or demolished cities—- a few well placed MOABS could start a volcanic eruption cycle in more than a handful of mountains. It may be biological as well—- but the prophecies regarding the apocalypse do say “1/3 of the earth’s greenery will be set ablaze and lost” — But think this could be satellite/DEW instead of nukes.