Is locust wood toxic if burned?

I have heard that it is, but cannot confirm it.

The reason given is that the same substance that keeps it

from rotting (a toxin to bacteria) is toxic to us as well.

Bottom line: locust firewood is far more useful in a wood

heater than a fireplace. One can heat a home with a

heater, but only a small room with a fireplace!

And besides, all smoke/fumes from wood-burning are

toxic in an enclosed area. I hope this helps someone.