If you use hard fats, you can stir in bird food and put it outside for them, then there's no waste at all.
If you can be arsed you can make pemmican with melted fat and dried, ground meat like the Eskimos did.
Another thing I do is wipe round wok or frying pan with kitchen paper and then use the oil-impregnated paper as a firelighter in the stove.
Escape pain courses; Livewell.
Richard E Grant's Very Modern Odyessey
a note of caution if you use mouth wash





