just burn some charcoal in an enclosed space and you're good to go. you'll just drift off to sleep.

Yeah. No need to travel down under or all the way to europe for that.

Do it in the comfort of your preferred space. Seal any openings, burn some coals, and leave scheduled post on your preferred social media platforms, telling authorities or loved ones where to find your body. That way, they won't stumble upon your body in a gruesome decomposing state later on.

You're unlikely to survive that unless someone manages to save you in the nick of time but if somehow the latter happens, then you gotta live with the consequences of your action.