The most common sources of CO are exhaust systems, furnaces, water heaters, kerosene space heaters, boat engines, cigarette smoke, gasoline or diesel powered generators, and fireplaces
[1] Sven-Eric Jordt, associate professor of anesthesiology, pharmacology and cancer biology at Duke University School of Medicine (North Carolina, USA) told the meeting that manufacturers claim that e-cigarettes are safe as they vaporize a defined set of chemicals that are chemically stable
For example, if you used to take smoke breaks at work, use that time to take a walk around the building or parking lot instead
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