Are you worried about breathing in foul air wherever you go? I don’t think this is a situation that can be avoided in this industrialized time and age, but just in case your paranoia gets the better of you, here is the Personal Carbon Monoxide Detector. Since carbon monoxide can’t be seen or smelled, it is deadly if the amount gets way above the normal level, but how often does that happen? Soothe your fears with this $39.85 palm-sized device which will not only flash a red LED light and ring an alarm when levels get too high for your own safety. Alternatively, once you see people start dropping like flies around you, that’s also a pretty good indicator to flee from the area.
Source: Book of Joe