@raphjd Interesting update -- I think of myself as a Google ninja, but was only able to find info from 2016. Nice to know that in NYS, we have gotten beyond the misguided stigmas that would disallow a pet's small box of ashes from being placed with its human companion.
I'm amazed that our (American) thoughts on burial once were -- and in some states, are -- so retrograde, that laws would rather have a human buried in a pet cemetery to be together.
Laws on keeping the "burial status quo" are, of course, defended by a big-bucks funeral home lobbying industry. "Regular human burial" is outrageous in price, and if people knew what was done to preserve the body and prepare it for open casket -- well, it's rather nasty.
Cremation is actually not the best solution if you're interested in your last decision being environmentally friendly. Recently, advocates of alternative options are making progress:
https://www.talkdeath.com/environmentally-friendly-burial-options/
https://www.joincake.com/blog/burial-alternatives-for-nontraditional-people/