Yes it still harmful because it is air pollution to your lungs. My kid's pediatrician used to tell me that I should change my clothes after smoking a cigarette and before I carry my baby.
In Scrum, a product backlog item (PBI, backlog item, or item) is a unit of work small enough to be completed by a team in one Sprint iteration. Backlog items are decomposed into one or more tasks. See also backlog effort estimation unit.
What Is a PBX Switchboard? PBX is an acronym for private branch exchange, an in-house telephone switching system used to interconnect both internal and external telephone extensions and networks. Its functions include least-cost routing for external calls, conference calling, call forwarding and call accounting.