What impact can a volcanic eruption have on climate climate is warmed from the heat of the eruption. climate is warmed from the heat of the eruption. climate is warmed as dust increases the greenhouse effect. climate is warmed as dust increases the greenhouse effect. climate is cooled as dust falls from the sky. climate is cooled as dust falls from the sky. climate is cooled as dust blocks incoming sunlight. climate is cooled as dust blocks incoming sunlight.