Wasp killer is a neurotoxin. When I was in the Army, they told us a way to test if the chemical warfare detection gadgets were working was to spray some wasp killer nearby. That would set them off, or so I was told.
I hate that stuff, but we keep a can of it in our garage anyway, because my husband is very allergic to wasp or bee stings, and an angry wasp could kill him. He uses it to knock down wasps in the air that are getting too close. I prefer to toss gasoline on the nest and kill them that way, if necessary. The sudden thermal shock makes them fall down dead. (You don't light the gasoline) They just get too cold and die.
Mostly we leave wasps alone, because on the whole they are good creatures. We just can't have them defending nests in areas where my husband has to work. We really ought to get him desensitized to them- he'd be a lot safer- but that is a long, drawn out, expensive affair I hear.
One of these years we'll get around to it.
Does anyone know if "petrolatum" is a petroleum product or not? I've stopped using my chapstick, because it has petrolatum in it- and petroleum products are the bad guys according to the book. But all of a sudden I'm not sure if it really is or not. I bought some natural beeswax stuff for lips, but it's much more expensive and doesn't work as well- so all of a sudden I am wondering if it really IS a petroleum product like it sounds like?
Edit
re: emphesema
When I was a teenager I worked as a nurse's aid in a retirement home and one of the residents was dying of emphesema. He was so pitiful, I've never even been tempted to smoke.