Leaf Blowers - Arghhh!

For the past 90 minutes or so, I've been auditorially assaulted by the incessant drone of leaf blowers. My neighbors' landscape service has been using their leaf blowers to clear the lawns of leaves. I don't know how much environmental damage is being done by these annoying devices, but I suspect it's not insignificant. Meantime, I don't know what the sound level of the blowers being used are, but they seem awfully loud, and perhaps more annoying, they are used for a long time. I'll need to check what our town's rules are, but I'm pretty sure that if they exist, these blowers are in violation.