miasma

Noun	1.	miasma - an unwholesome atmosphere; "the novel spun a miasma of death and decay" ambiance, ambience, atmosphere - a particular environment or surrounding influence; "there was an atmosphere of excitement"
	2.	miasma - unhealthy vapors rising from the ground or other sources; "the miasma of the marshes"; "a miasma of cigar smoke" air pollution - pollution of the atmosphere; "air pollution reduced the visibility"

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