Costa Rica’s Rincon de la Vieja Turns Two Rivers Milky Gray

Environment Key Facts —The change. Two rivers by Rincon de la Vieja volcano turned milky gray over the weekend. —The cause. Small eruptions and heavy rain washed volcanic material into the Azul and Pénjamo. —The activity. Scientists logged 23 small steam-driven eruptions in a single week. —The plume. The strongest, on July 6, sent a…