The 2010 eruption of Eyjafjallajokull in Iceland also cancelled many flights and closed European airspace for many days; the fact the eruption happened actually helped the environment as less CO2 was emitted due to the lack of planes!
Also in 1995 the eruption of the Soufriere Hills Volcano on the island of Montserrat covered 2/3 of the island in volcanic ash. Farmland was damaged too and lots of floods happened because the valleys were blocked by ash. As the southern half of the island was practically destroyed there are not many inhabitants on the island anymore and traveling to the port and airport is still very difficult. Over half the population of the island left after the eruption and have not returned. Its kind of sad when a natural disaster causes something like that to happen 🙁