![](http://www.ecns.cn/hd/2021/05/21/e127d4c5d81342b8a7ec657548816abd.jpg)
Mount Etna, Europe's most active volcano, lights up the early morning sky with smoke and lava during an eruption, as seen from Trecastagni, Italy, May 19, 2021. (Photo/Agencies)
![](http://www.ecns.cn/hd/2021/05/21/2bc6ebdec8a740818d32194e06e60582.jpg)
Mount Etna, Europe's most active volcano, lights up the early morning sky with smoke and lava during an eruption, as seen from Trecastagni, Italy, May 19, 2021. (Photo/Agencies)