Volcanoes can be costly. The Kilauea eruption of Feb 28, 1955 destroyed 21 houses, 10km of road, 4000 acres of sugar plantations and one coffee plantation: the damage was 40 million dollar in today’s prices. The cost of Mount St Helens was 1 billion dollar. Both events were eclipsed by Eyjafjallajokull: its price tag of…