Wife brings home a carton of Duraflame "logs" for the fireplace. Here in south Florida you want a cozy fire about two nights per year, and storing real firewood invites termites, so we put up with this faux fire. Now these log things always used to smell OK, being sawdust and petroleum wax. But now they say, "NEW! All Natural Ingredients".
After shelving the new inventory, the room stinks strongly, strongly of STALE HOT DOG WATER like you're at a ball game or something.
A little MSDS research discloses they are now made of sawdust and a "proprietary blend of fatty acids".
This info and the odor suggests to me that these things are now made from sawdust soaked with animal grease kept on the brink of rancidity with nitrates.
Ugggh!
Like Uncle Al sez, "environmentalism: expensive, shoddy, deadly".