A toxic atmosphere is a type of air POLLUTION that is caused by the release of hazardous gases and particles into the environment. The term MIASMA, which has 6 letters, is often used to describe this type of atmosphere. MIASMA is derived from the Greek word for 'POLLUTION' and refers to a noxious, poisonous, or foul-smelling vapor or mist. It is typically associated with stagnant air, which can be caused by industrial activities, vehicle emissions, and other sources of air POLLUTION.