's volcanic eruption in January blasted enough water to fill more than 58,000 Olympic-size swimming pools - and could weaken the ozone layer.Scientists who examined the amount of water vapour ejected by the Hunga Tonga-Hunga Ha'apai volcano described it as 'unprecedented'.The powerful steam was formed when seawater in the South Pacific came into contact with the lava and was 'superheated'.
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