Which is "worse": a (bad) volcano or a (bad) tornado?

My roommate and I have been in a heated debate for the longest time about which is "worse." The main points we've considered are longevity, speed, environmental repercussions and of course, deadliness; however, more points of view are welcome.

Also, if they were to fight, who would win?
By annis_2006 11 years ago :: General
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