Don't everybody panic about burning cedar telephone poles. There are a few different types of treated poles. By looking they are easy to tell apart. There are the redish brown ones called a full treat, treated with creosote top to bottom, don't burn those. Then there is the butt treated poles, they are only treated from the base to approximatly 12feet up or at the hash mark, ok to burn the portion above 12feet of the hash mark as that is untreated. Then there are the green treated ones don't burn them. Sometime it is easier to do a cut on a pole above the hash mark and look at the wood for any sign of being treated. Burning the creosote in the open is not to bad, but when you burn it in a wood stove it creates some toxic gases etc. We must tag our old treated poles with a do not incinerate tag. We are also warned not to have skin contact with the green ones, not to sure what it will do to you, but it's ok to use it in playground structures.
Bob