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"The extremely high concentrations of carbon monoxide produced by an engine can raise CO concentrations in a closed building so quickly that a person may collapse before they even realize there is a problem.<a href='http://batescomp.com/qa/what-happens-if-you-leave-a-car-running-all-night.html#qa-why-is-it-dangerous-to-leave-a-car-engine-running-in-garage'>continue reading</a>"
<https://batescomp.com/qa/what-happens-if-you-leave-a-car-running-all-night.html>