Assertion: carbon monoxide | /r/AtLocation | indoor and outdoor air
Facets:
Source sentences:
text: It is present in indoor and outdoor air in varying amounts from things like vehicle exhaust, gas stoves, wood-burning stoves, furnaces and cigarette smoke, which can contain high levels of carbon monoxide.
text: Carbon monoxide is a colorless, nonirritating, odorless, tasteless gas that is found in both indoor and outdoor air.