Europe's most active volcano, Mount Etna on Sicily, is erupting again, sending a huge plume of ash and smoke into the air and lava flowing down its slope.

A massive volcanic eruption occurred at Mount Etna on the Italian island of Sicily on Monday, shooting massive ash plumes ...

Thick smoke from some of the 84 wildfires in Canada have begun drifting south into the U.S., creating hazy and potentially unhealthy conditions in the Midwest and parts of the upper Plains.

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