A Random

SCIFI.radio story

Earth receives a visit from future selves with warnings of impending doom who want to plug us into a power grid and use us as living batteries even though they are only slightly radioactive who tend to stutter under pressure when confronted by the army, navy, air force, space force and/or marines , but scientists create a new weapon which turns them into weird rocks.
The End.so they eat us all.
The End.