It depends on moisture content and the kind of waste. High moisture content needs more energy to burn.Please, please provide some proof of this, I would love to read how burning, a chemical reaction that releases energy, uses more energy than it produces??
Or you could either ignore me or say you don't want to argue
Obviously if you are burning plastic it's different.
A lot of the stuff has been left in piles in the rain and is soaking wet. See it daily very close to my warehouse. Stinks to high heaven.