Jedi Knights are cremated in this way, remember the end of "Return of the Jedi"?
Even if this was allowed you'd have the usual Nimby problem. Look what it's like when a council wants to build an incinerator, and they are much cleaner than this would be. Would you like it up the road from you? See my point!
Also on a technical point, there's about 800 million Hindus in india and they must die at the average rate, if they are all cremated like this, india must be as black as Newgate's knocker FFS! Not to mention unbreatable, some kind sole enlighten a confused Geezer, thanks.