By Barry N. Kaye and Brian Kopperl Have you ever been in your backyard on a beautiful day when the noise of the leaf blowers next door was so loud that you could not have a quiet conversation, you were dodging the flying debris, and the smell was enough to make you go indoors? Most of us agree that leaf blowers are annoying, but some of us may not know just how harmful they really are.    Gas-powered leaf blowers typically have noise levels of 80 decibels (dB) or higher, which the Centers for Disease Control states can damage hearing. [READ MORE]