I remain convinced you can generate cheap power by having everyone in your neighborhood donate small amounts of money to a wide variety of non-profits, and burn the resulting flood of mail.
Less so with non-profits, more for things like catalogs, free magazine things, etc.
Like can you power a "wood" stove with enough dense paper? And if you're getting 100 heavy catalogs a day, will the USPS keep delivering them?
Or is there some kind of practical limit that the USPS won't do residential delivery of commercial mail beyond a certain daily amount?
Surely there's some reason you can't heat your house this way.
The sender is paying, and they are generally pleased people are giving then money.
Loose paper burns quickly so you'd be filling up the stove constantly.
[0]https://www.amazon.com/Pine-Mountain-Traditional-Campfire-Fi...
If you weren't inclined to send in another donation, you could remove those stamps and use them for your own mail!