Sicily's Mount Etna put on a fiery show on Monday, sending a cloud of smoke and ash several kilometres into the air. Although ...

Sicily's Mount Etna put on a fiery show on Monday, sending a cloud of smoke and ash several kilometres into the air, but officials said the activity posed no danger to the population. The level of ...

Cancel anytime. ST. LOUIS — Scientists have long known the thick, billowing smoke clouds that wildfires launch into the atmosphere affect climate change. Now, Washington University researchers ...