A great example of this is the Mount Pinatubo eruption in 1991. It released nearly 22 million tonnes (20 million metric tonnes) of sulphur dioxide into the air, forming a massive blanket over our atmosphere that blocked some of the sun`s rays.

As a result, global temperatures dropped by about 0.9°F (0.5°C). Volcanoes can also trigger rainfall and evenfog, and you`ll offen see a ring of clouds around their tops.•