system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why won't the world use rubbish as their new source of electricity?

Apparently Sweden has literally ran out of trash because of this method. So why don't other countries just follow suit?
gpt
Trash is kind of a pain to burn as it's super inconsistent as a fuel.  Also, it can be quite polluting depending on what gets put in the trash; e.g.: batteries in the trash = bad news for what ends up in your air/water when you burn them.

Sweden goes to a lot of trouble to use their trash as fuel.  From what I've heard/read they do a pretty good job all things considered, but it does cost them quite a bit more to run their trash-energy program than a lot of other energy plans would.

Edit:  As a followup,  you basically have to put people into the cycle in some sort of trash-sorting role to make it work well; the automated sorting processes aren't good enough yet...  This is the main part that gets expensive.