Answer: emission

AnswerCrossword Clue
EMISSIONSmog test's concern
emissionthe act of emitting (to send forth)
emissionan act or instance of emitting emanation
emissionputting into circulation
emissionblication
emissionfluvium
EMISSIONE.P.A. concern
EMISSIONSubstance discharged
EMISSIONCarbon dioxide, for one
EMISSIONDischarge
EMISSIONCarbon monoxide from an engine, e.g.
EMISSIONE.P.A. measurement
EMISSIONRelease
EMISSIONDischarge into the air
EMISSIONA putting into circulation
EMISSIONIssuance, as of money
EMISSIONAct of sending forth.