Good thing we do not have volcanoes modeled in the game or many airlines would shut down. The situation in Europe is a mess. My hometown airport ( Lisbon Portela ) is one of the few that remains open but if the wind changes it will be closed as well.
Ps: Sorry for the off topic post but this issue seems relevant and we should have an off topic section in the forum.
https://www.airwaysim.com/forum/index.php/topic,20021.0.html (https://www.airwaysim.com/forum/index.php/topic,20021.0.html) ;)