That's odd, I used that link several times from that comment, but now it's changed.
At any rate- I think that it's likely far easier to deal with waste that can be put in a barrel and placed somewhere, rather than waste that diffuses into the atmosphere and stays there permanently.
An ideal waste disposal site would probably be a landfill in some unpopulated endorheic basin somewhere, so that there is no risk of contamination of waterways.