Despite grounding 100,000 flights across Europe , battering a beleaguered airline industry, stranding hundreds of thousands of travellers, disrupting schools and businesses, and giving homes under flight paths their first peace and quiet in decades, the current volcano eruption may be only a teaser of chaos to come. A far bigger Icelandic volcano, Katla, is tipped to erupt in the coming months, potentially causing much more savage and sustained disruption to industry and society. Eyjafjallajokull erupted on 14 April, forcing European governments to impose a no-fly zone. Each time Eyjafjallajokull has erupted in the past 2,000 years – in 920,...