The methodology of this study makes little sense. Looking at the agriculture waste, by far the heaviest and most plentiful 'waste' item would be manure. But manure is tilled back into the fields to be used as a natural fertilizer, so is it really waste?
And in mining, if you take rocks, extract the gold/silver/other metals, and then dump the remaining rocks back out, that's a lot of tons of 'waste'. But they were rocks before and they're still rocks after, very little has changed, but they sure racked up a lot of waste tonnage for this study.
|