A Curtin University-led paper, "The Use of Plastic as a Household Fuel among the Urban Poor in the Global South" published in Nature Cities, has called for action to reduce the burning of plastics for heating and cooking, a common yet hazardous practice emerging in millions of households in developing nations due to a lack of traditional energy sources.
When I was a kid, there was a family that moved in next door to us. They used to burn their trash (not an uncommon thing to do in rural NM in the 80s), but they would grill over it too. Dirty diapers, tires, anything they could light, they would use as fuel for their cookouts.