Ash from Iceland volcano has grounded much of western Europe 's air traffic . Maria D'Arrigo says Iceland volcano in 1783 had drastic effects . She says it killed many , stunted agriculture and led to famine . A similar event today could stop some air travel for five years , she says .
Ash from Iceland volcano has grounded much of western Europe 's air traffic . Rosanne D'Arrigo says Iceland volcano in 1783 had drastic effects . She says it killed many , stunted agriculture and led to starvation . A similar event today could prevent some air travel for five months , she says .