Popocatépetl volcano spews smoke and ash, putting millions of Mexicans on alert

Popocatépetl volcano spews incandescent material on Tuesday. The second highest volcano in the Mexico increased its activity, and authorities raised the alert to the second-highest level. Cristopher Rogel Blanquet/Getty Images hide caption toggle caption Cristopher Rogel Blanquet/Getty Images Popocatépetl volcano spews incandescent material on Tuesday. The second highest volcano in

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