Surrender

Premise: commercial nuclear fusion is attained and the mechanism can fuse pretty much what you throw at it AKA Mr. Fusion.

Imagine every power tool run indefinitely with your lithium hydride fusion battery. You could carve Mt. Rushmore with that chain saw in about a month, and still use just a small fraction of the cost of a gallon of gasoline. You could do a charity lawn cleanup on Brazil and get all those dead cities well manicured. 

With this kind of fusion power, you could fly to Titan, bring back its ocean of gasoline, and run ICE vehicles to the death of the sun.

Fusion was deadly in the form of H bombs but this is what everyone worried about: the next step. Fusion annihilation in a gun. Powered by lithium 6 cartridges in a magazine.

All those old batteries from the electric cars, how much lithium 6 they got in those discards? Ah, well, the natural abundance of lithium isotopes is L-7: 92.4 and L-6: 7.59

Eight percent of my lithium battery recycling stream is a fusion bomb.