Build towers that will reduce anything dropped into it to atoms.
Sort the atoms into piles.Nuclear energy gives us lots of power. Heat everything to a vapor / ion cloud.This reduces every animal, vegetable, mineral, solid, liquid, and gas to atoms.Tesla could reduce used batteries to lithium, nickel, etc. 
It could recycle any and all plastic.
It could convert CO2 to carbon and oxygen atoms.
It would be the ultimate source of pure raw materials.No more trash dumps.