Yes. The hill of Arthur’s Seat in Edinburgh is all that remains of a volcano that last erupted some 340 million years ago. Volcano Live's Ed Byrne listed it as his favourite volcanic feature in the UK.
A dormant volcano is one that is not currently erupting, but could erupt again one day. An extinct volcano is one that scientists think will not erupt again.
Our resident volcano expert Dr Clive Oppenheimer answered this in our web chat on Monday night. According to Clive, volcanoes emit a tiny fraction of greenhouses gases compared with human activity. However, large eruptions can cool the planet for a couple of years.
According to the United States Geological Survey, the deadliest eruption in recent history was Krakatoa in 1883. The major cause of destruction was not lava or pyroclastic flows, but the enormous tsunami which resulted from the eruption.