The most common source of carbon monoxide pollution is vehicle exhaust. its a t or f question

The most common source of carbon monoxide pollution is vehicle exhaust is true.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

Answeraddiction; i know this to be true: )