Sentences with phrase «toxic volcanic gases»
Scientists hypothesize that releases of toxic volcanic gases rendered the area's air and water lethal to most life in a short time.
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Life on Earth likely emerged in the deep ocean, where simple organisms fed off toxic gas from volcanic vents.
Scientists now think that massive volcanic activity, in a Large Igneous Province called the Siberian Traps, raised air and sea temperatures and released toxic amounts of greenhouse gases into the atmosphere over a very short period of time.