volcanic ash in the atmosphere decreases the temperature by blocking the sun
atmospheric_layer is gas. cloud has effect_of_partially_blocking_sunlight volcanic_eruption is emitting. volcanic_eruption is discharge. greenhouse_effect is heating_air. blocked_sunlight has powerful_effect_on_microclimate sunlight has effect_of_heating_earth volcanic_glass is volcanic_rock. atmosphere is thinner_as_altitude_increases. partially_blocking_sunlight has effect_of_cooling_earth