My calculations are larger by a factor of 2.5 (you've probably used density of water but I think that's a bit optimistic, don't know much about garbage compacti

My calculations are larger by a factor of 2.5 (you've probably used density of water but I think that's a bit optimistic, don't know much about garbage compaction). I mostly agree it's not as bad as it seems; however that doesn't account for the <100% disposal effectiveness (a certain % will realistically always make it to streets, rivers, oceans), or as others mentioned some chance of environmental leakage of landfills (an associated issue is energy efficiency and energetic cost of packaging and disposal) -- i.e. I wouldn't dismiss waste in total as an absolute non-issue.