The Cotopaxi volcano, one of the world's most active volcanoes, spews ash and smoke as seen from Quito, Ecuador, August 22, 2015. The Geophysical Institute reported that the volcano, which has had sporadic activity since last week, entered an active state of eruption on Friday after a 530 am (10:30 GMT) tremor. (Photo by Guillermo Granja/Reuters)
|