I prefer lower temperatures for seasoning an iron pan. I’ve had pans aquire an horrible burnt-oil taste if I season it at too high a temp.
But I never buy new, shiny pans and then season them. I’ve gotten all my cast iron stuff from garage sales and second-hand stores. That probly makes all the difference.
The health hazards to humans seem to be quite low from normal use of non-stick cookware. There are other—admittedly more serious—potential hazards if you happen to work with PFC’s (PerFluorinated Chemicals), such as polytetrafluoroethylene (or PTFE, commonly known by the trademark name "Teflon). These hazards are mostly for persons who encounter PFC’s in large quantities in a factory in their more unstable states before they’re applied to cookware and cured. Or if you live in a community where PFC’s may have been dumped and entered the water supply, there’s some risk. But you’re almost certainly in no danger from normal cooking use. Unless, as I said, you’re a parrot.
I have a bird, so it may be overkill, but I open all windows and doors whenever I burn anything. Picturing a canary in a coalmine. Although my bird’s no canary, I figure better safe than sorry. I also once had three nightingales die within about 15 minutes of each other, with no discernible cause. I can only assume that there was something blowing in the windows that day that I could neither see nor smell. Thus my paranoia about fumes and birds.
That’s good paranoia. It doesn’t take much to take them down.
3 birds in 15 minutes? That’s quite a mystery. 'Prolly not anything toxic in the air, though. Blowing in through the window on a windy day, it would be difficult to get any kind of concentration. A still day, maybe.
If you kept the birds below ground level, you might have something like propane gas, which pools. Other than that, not much.
More likely, there was a large temperature difference when you opened the window and the shock of the temp change took them down. Likelier still though is a contaminant in their food or water.
Nope, all those considered and rejected. The only theory that I can’t disprove is that someone was spraying insecticide or something in the neighborhood. Will never know.
I was killing dandelions with a dandelion bar last summer, with (I thought) the proper precautions, and when I finished, I came inside, had lunch, went to the bathroom and puked it up (and I never puke). My point is that things can be a lot more toxic than we expect them to be.